With the Intro Psych course, we have the ability to save lives. For example, our discussion of attention may help students stay off their phones while driving or help students refuse to ride with someone who talks on their phone while driving. Our discussion of stress and evidence-based coping strategies may help students find ways to reduce stress or cope better with their stress, leading to healthier outcomes in both the short- and long-term. I had another example just this week. After covering sleep, one of my students is encouraging his father to get screened for sleep apnea. Here's another way that Intro Psych can save lives that I just learned about from the February 2023 issue of Scientific American (Kwon, 2023). Of those diagnosed with REM behavior disorder, up to 80% will be diagnosed in 10 to 12 years with a neurodegenerative disease, most commonly Parkinson’s disease. When the common symptoms of Parkinson’s appear—such as hand tremors (although hand tremors do not appear in everyone with Parkinson’s)—over 40% of the dopamine-producing neurons in the substantia nigra of the basal ganglia are gone (Ohtsuka et al., 2013). (I’ve also seen medical websites say 50% and 80%, but they don’t site a source.) Let’s just say that bunches of neurons have been lost before the traditional symptoms appear. MRI can be used to detect the loss of neurons in the basal ganglia (Bae et al., 2021), but, of course, most people don’t get an MRI until they show symptoms. Earlier detection means being able to start interventions earlier which may slow the progression of the disease (Prashanth & Dutta Roy, 2018). During REM sleep (and for most of us), our major muscle groups are turned off. In REM behavior disorder, the major muscle groups remain online resulting in an acting out of the dreams. Alan Alda was being chased, so he picked up a sack of potatoes and threw them at his attacker. When Alda awoke, he saw that he had thrown a pillow at his wife. Alda had seen a 2015 news story about the emerging evidence of REM behavior disorder being a marker for the potential development of Parkinson’s. A brain scan confirmed it; Alda had Parkinson’s (Kwon, 2023). There is evidence that neurodegeneration and a buildup of a protein called synuclein (click for pronunciation) within the pons and medulla (both within the brainstem) play a role in REM behavior disorder (Chiaro et al., 2018). One possibility is that, over time—say, 10 to 12 years—the synuclein protein clusters spread up into the basal ganglia, damaging those neurons. When enough of those neurons are damaged, we may begin to see Parkinson’s symptoms, such as hand tremors. But here’s the fascinating part. A person with Parkinson’s who experiences slowed muscle movement, rigid muscles, and tremors while awake, has these symptoms seemingly vanish when showing symptoms of REM behavior disorder. While the symptoms of Parkinson’s are due in large part to damage within the basal ganglia, REM sleep bypasses the basal ganglia. While acting out a dream, full movement returns. This raises an interesting possibility. Could treatments bypass the basal ganglia when the person is awake? In the meantime, researchers are looking for ways to reduce synuclein before it does so much damage, and a diagnosis of REM behavior disorder may be one way to identify people at risk but before significant neuron loss occurs (Kwon, 2023). REM behavior disorder has an estimated prevalence of 1% (Haba-Rubio et al., 2018) in the general population. If you teach 200 Intro Psych students annually, and each student has, on average, 10 relatives (totally made up number; I have over 60 relatives, including siblings, aunts, uncles, cousins, nieces, and nephews), sharing this information on the relationship between REM behavior disorder and Parkinson’s with your students could reach 2,000 people.  At 1% prevalence, we would expect 20 of them to have REM sleep disorder. If 80% are expected to develop Parkinson’s (or similar disease) in 10 to 12 years, that would be 16 of them. If those 16 were diagnosed early, the progression of Parkinson’s could be slowed. Your math may vary, but the result is the same. What you cover in Intro Psych could save lives.   References Bae, Y. J., Kim, J.-M., Sohn, C.-H., Choi, J.-H., Choi, B. S., Song, Y. S., Nam, Y., Cho, S. J., Jeon, B., & Kim, J. H. (2021). Imaging the substantia nigra in Parkinson disease and other Parkinsonian syndromes. Radiology, 300(2), 260–278. https://doi.org/10.1148/radiol.2021203341 Chiaro, G., Calandra-Buonaura, G., Cecere, A., Mignani, F., Sambati, L., Loddo, G., Cortelli, P., & Provini, F. (2018). REM sleep behavior disorder, autonomic dysfunction and synuclein-related neurodegeneration: Where do we stand? Clinical Autonomic Research, 28(6), 519–533. https://doi.org/10.1007/s10286-017-0460-4 Haba-Rubio, J., Frauscher, B., Marques-Vidal, P., Toriel, J., Tobback, N., Andries, D., Preisig, M., Vollenweider, P., Postuma, R., & Heinzer, R. (2018). Prevalence and determinants of rapid eye movement sleep behavior disorder in the general population. Sleep, 41(2). https://doi.org/10.1093/sleep/zsx197 Kwon, D. (2023, February). When dreams foreshadow brain disease. Scientific American, 328(2), 58–63. https://doi.org/10.1038/scientificamerican0223-56 Ohtsuka, C., Sasaki, M., Konno, K., Koide, M., Kato, K., Takahashi, J., Takahashi, S., Kudo, K., Yama**bleep**a, F., & Terayama, Y. (2013). Changes in substantia nigra and locus coeruleus in patients with early-stage Parkinson’s disease using neuromelanin-sensitive MR imaging. Neuroscience Letters, 541, 93–98. https://doi.org/10.1016/j.neulet.2013.02.012 Prashanth, R., & Dutta Roy, S. (2018). Early detection of Parkinson’s disease through patient questionnaire and predictive modelling. International Journal of Medical Informatics, 119, 75–87. https://doi.org/10.1016/j.ijmedinf.2018.09.008     ... View more

Here’s a question for your students after covering the brain in Intro Psych: “How would you react if you learned, today, that you were missing your left temporal lobe?”  In 1987 at the age of 25, EG (not her real initials) happened to have an MRI scan, and her physicians—and I imagine, she—were surprised to see a blank spot where her left temporal lobe should be. EG is highly educated with strong language skills. Her missing left temporal lobe does not appear to be affecting her in any way (Tuckute et al., 2022). Unless we have had an MRI scan of our brain, we have no idea if we have a neurotypical brain or if we, too, are missing an entire cerebral lobe. In the research article (Tuckute et al., 2022), Figure 2a features MRI scans of EG’s brain from the right, the front, and the top. The images are worth sharing with your students. In early childhood, language processing is bilateral. It is only later that language specialization—for most of us—moves to the left cerebral hemisphere. EG does not recall any early childhood brain trauma, so it may be that EG’s missing left temporal lobe was congenital. In any case, EG’s brain had no problem turning language specialization over to her right hemisphere. While EG’s left frontal lobe is intact, it is her right frontal lobe that is language dominant, not left. Researchers speculate that it is the language specialization of the temporal lobe that drives the language specialization of the frontal lobe. If that specialization happens in the left temporal lobe, then the left frontal lobe also develops language specialization. Conversely, if that specialization happens in the right temporal lobe—as it did for EG—then the right frontal lobe also develops language specialization. EG’s experience is a good one to share with Intro Psych students, because it illustrates the remarkable flexibility of the human brain. The research article featuring EG opens with a statement from EG herself. She opens with how she came into contact with this group of researchers in 2016. Then EG reminds us that the language we use matters. “Though [the research team’s] studies answer some questions about how my brain is wired the same as or differently than a typical brain, it does not tell others who I am. Please do not call my brain abnormal, that creeps me out. My brain is atypical. If not for accidently finding these differences, no one would pick me out of a crowd as likely to have these, or any other differences that make me unique” (Tuckute et al., 2022, p. 1). With many of our Intro Psych students preparing for careers in healthcare, EG includes an important reminder that each patient is a person, not merely a collection of health conditions who should then fit into a particular health condition box. “In the past, several well-meaning but misguided healthcare professionals have told me that I should not have more than a 5th grade vocabulary, that I should have seizures, or that I should have other deficits and limitations. I do not. They seemed disappointed, even angry, that I did not have the limitations they unilaterally pronounced that I should have, without the benefit of any further investigation” (Tuckute et al., 2022, p. 1).   Reference Tuckute, G., Paunov, A., Kean, H., Small, H., Mineroff, Z., Blank, I., & Fedorenko, E. (2022). Frontal language areas do not emerge in the absence of temporal language areas: A case study of an individual born without a left temporal lobe. Neuropsychologia, 169, 108184. https://doi.org/10.1016/j.neuropsychologia.2022.108184   ... View more

Students should not only be taught the core concepts of introductory psychology, but also how those ideas play out in their daily lives and the world around them. In a seven-part video series produced exclusively for Macmillan Learning, Garth Neufeld shows how APA’s Introductory Psychology Initiative (IPI) offers a guided structure for doing just that. As Professor Neufeld (Cascadia College) explains, APA’s IPI’s themes help students understand the trends and patterns of human thoughts and behaviors, which are concepts they can then apply to their current and future studies, and to their lives beyond the classroom. Furthermore, APA IPI themes allow instructors to organize course goals, learning, and assessments around these key topics. Watch the full series with a community account. ... View more

What can cab drivers tell us about Alzheimer's Disease? Quite a lot, it turns out. London Cabbies' Brains Analyzed for Alzheimer's Research https://www.washingtonpost.com/lifestyle/2021/11/01/london-taxi-driver-alzheimers-research/ ... View more

Lady Gaga’s Born This Way Foundation is promoting intentional acts of kindness this September (#BeKind21) with a goal toward better mental health for everyone. Every day, from September 1 to September 21, let’s engage in purposeful acts of kindness to others and ourselves. I encourage you and your students to sign up.   Zara Abrams (2021) provides a nice summary of the research on kindness, emphasizing its benefits to both our physical and mental health. Even small acts, such as bringing a colleague coffee, counts. Buying me a beer also counts. Without too much difficulty, we can tie acts of kindness into what students are learning in their Intro Psych course. Here are a few examples. Biopsych chapter: Which neurotransmitters are most likely to be released in our brains when we do good deeds for others? Explain Development chapter: What are developmentally-appropriate good deeds we could perform for each group: toddlers, middle-schoolers, high-schoolers, middle-aged adults, older adults? Explain. Learning chapter: Identify at least three acts of kindness you have engaged in. Was your act positively reinforced? Explain. Memory chapter: We tend to have stronger memories for events that are emotional. Based on the emotional reaction of those who were on the receiving end of your kindness, will any of your acts of kindness be remembered years from now by one of your recipients? After September 21st, give your students an opportunity to reflect on their experience. What was especially good about engaging in intentional acts of kindness? Were there any surprises? Will they continue to be intentionally kind?   References Abrams, Z. (2021, August). The case for kindness. American Psychological Association. https://www.apa.org/news/apa/kindness-mental-health ... View more

Have you spend time reading or binge-watching your favorite shows this year? Research suggests that those beloved characters mean as much to us as our friends, at least if we are immersed in the fictional environment: https://www.psychologytoday.com/us/blog/time-travelling-apollo/202104/mind-melding-our-favorite-fictional-characters ... View more

The Neural Basis of Empathy via Knowing Neurons (and check out some of their other easy-to-digest articles for students while you're there!): https://knowingneurons.com/2021/03/29/neural-basis-of-empathy/ ... View more

Fascinated by serial killers? Check out this article on the research looking at brain differences in psychopathy https://bigthink.com/mind-brain/what-is-a-psychopath?utm_term=Autofeed&utm_medium=Social&utm_source=Twitter#Echobox=1615204146 ... View more

In 2017, I wrote a blog post about an activity designed to help students see how the number of drug overdose deaths have changed since 1968 using this interactive article from the New York Times. Carolyn Brown Kramer, via the Society for the Teaching of Psychology Facebook group, asked for updated drug overdose statistics. After having your students complete the activity from that initial blog post, provide students with the most current drug overdose death data presented below. The Centers for Disease Control and Prevention (CDC) provides a “Drug Overdose Deaths” statistics dashboard that is updated monthly based on the best available data. Keep in mind that the best available data are several months old. As I write this in March 2021, the latest data are for July 2020. Line graph Each data point in the line graph is a 12-month rolling total. For example, the number of drug overdose deaths reported for July 2020 are the number of drug overdose deaths that occurred between August 1, 2019 and July 31, 2020. The number of such deaths reported for June 2020 occurred between July 1, 2019 and June 30, 2020. Mouse over a data point to see the numbers. In the line graph you will see both “predicted” data (circles) and “reported” data (solid line). As they explain on the dashboard page, “Drug overdose deaths often require lengthy investigations, and death certificates may be initially filed with a manner of death ‘pending investigation’ and/or with a preliminary or unknown cause of death.” For “reported” data, the investigation is complete. The “predicted” data include deaths that are “pending investigation.” Both reported and predicted data will change as those investigations are completed. Ask your students to predict how the number of drug overdose deaths have changed in your state or District of Columbia, then change the jurisdiction to your location to show students the data. Map For easy visual comparisons between states/District of Columbia, the map displays data by location based on the number of drug overdose deaths for the most recent month for which data are available compared to the data from a year earlier. At the time of this writing, the comparison is between July 2019 and July 2020. The colors depict percentage change between those two months. North Dakota and North Carolina were the only two states with a decrease in the number of reported drug overdose deaths, down 2.3% and 1.7%, respectively. Alaska reported no change. All other states reported an increase. The District of Columbia had the biggest change during that time period with an increase of 56.8% in number of reported drug overdose deaths (308 to 483). Data Tables Sortable data tables of the line graph data and the map data are available directly below the map. Whatever you have selected as the jurisdiction for the line graph, those are the data that will be displayed in the first data table. A word of caution As you cover this very important topic with your students, remember that some—perhaps many—of your students has had someone they know die from a drug overdose. Or perhaps some of your students themselves came close to dying from a drug overdose. Always remembering that I’m talking about experiences my students have had helps me use language that is sensitive to the people behind the statistics. ... View more

This is a whole new level of walking in someone else's shoes! Virtual Body Swapping With Friend Can Alter Your Sense of Self https://psychcentral.com/news/2020/08/31/virtual-body-swapping-with-friend-can-alter-your-sense-of-self?utm_source=twitter&utm_medium=social&utm_campaign=owned&utm_content=2021-02-24#1 ... View more

Can privacy coexist with technology that reads and changes brain activity? https://www.sciencenews.org/article/technology-brain-activity-read-change-thoughts-privacy-ethics ... View more

Shout out to the Society for the Teaching of Psychology Facebook group for sharing their favorite tools for helping students study the brain. Printable black and white images of the brain from Clipart Library (shared by Achu John) Images include the brain, the eye, and the neuron. Use these images as diagrams on your next exam, write on them during your lecture using a document camera, and print them for students to take notes on. This webpage also includes a half-court basketball drawing, an empty times table chart, and a two-circle Venn diagram. I’m not entirely sure how you can use these for teaching brain-related things, but you’ll have them if you need them. 3D Brain app for iOS, Android, and web (web version needs Adobe Flash) was produced by the DNA Learning Center at Cold Spring Harbor Laboratory (shared by Kat West) From the dropdown menu, select the brain area of interest, such as Broca’s area. The image of the brain turns gray with Broca’s area highlighted in purple. A paragraph of text tells us what Broca’s area does and another paragraph gives us a case study. We get some information about associated functions, cognitive disorders, and what we see when Broca’s area is damaged. Three research reviews round out the text. The directional controls in the lower right allow you to rotate the brain image. Use this website during your lecture to show where the brain areas in a three-dimensional space. Students can use it as a study tool. Be aware that the functions associated with each brain area in the 3D Brain likely paints a more complicated picture of how the brain works than your Intro Psych textbook. For example, the amygdala, the 3D Brain tells us, is associated with “fear-processing, emotion processing, learning, fight-or-flight response, and reward-processing,” which is a bit more than the strong emotions-like-anger-and-fear that a lot of Intro Psych textbooks report. Pocket Brain, Brain Anatomy, and Brain and Nervous Anatomy Atlas ($9.99) all for iOS (shared by Susie Veccio); My Brain Anatomy and Brain Tutor 3D Some of these are at a level appropriate for Intro Psych. Others may be more appropriate for a neuroscience course. Take a look at each of them yourself before recommending to your students. Neuroscientifically Challenged videos (shared by Susanne Biehl) "These 2-Minute Neuroscience videos will help you learn the basics of neuroscience in short, easy-to-understand clips." Bonus resources BrainFacts.org (a resource by the Society for Neuroscience) has a webpage for educators. The target audience is K-12, but many of the resources for secondary ed teachers would also work for higher ed. The website includes a “Find a Neuroscientist” database. “Neuroscientists around the world are eager to help you educate about the brain. Our database has scientists in more than 40 countries. Connect with a scientist in your community today.” Enter your location, and a list of neuroscientists will come up. How to pick one and how they can help you is not clear, but there you go. The Tale of the Dueling Neurosurgeons by science writer Sam Kean This book is a must-read for anyone teaching neuroscience. Each chapter focuses on a different part of the brain. We get the back story on the research, a report on current research findings, and a handful of case studies. Take notes as you read; your neuroscience lectures will be much more compelling. (Read my 2015 book review.) Christina Ragan's Teaching Resources for Biological Psychology and Neuroscience Facebook Group  This is "a a centralized location to share activities, links, readings, videos, etc. on topics related to biology, psychology, and neuroscience." If you're looking for a community for sharing such resources, this is a good one. What are your favorite resources for teaching the brain? ... View more

Crows are smart. Never underestimate a crow. Comparative psychology is “the study of nonhuman animal behavior with the dual objective of understanding the behavior for its own sake and furthering the understanding of human behavior” (American Psychological Association, n.d.). The better that we understand how crows behave, think, communicate, and solve problems, the better we will understand both crows and ourselves. I have a short written assignment that my Intro Psych students do. After its completion, students have a greater appreciation for the crows around them. John Marzluff, a University of Washington zoologist, has made studying crows his life’s work. In his 22-minute TEDx talk, Marzluff shares what he thinks everyone should know about crows. I assign this during the thinking chapter in Intro Psych, after we’ve covered neuroscience and learning. It makes for a nice review of previously covered content. Here are the questions I ask my students to address: What three factors does Marzluff cite for the crow's problem-solving ability? Explain how each contributes to problem-solving skills. How do the brain areas of crows map onto the human brain? What do those brain areas do and why are they important? How do their brains differ from those of humans? Give an example from his talk of how the birds' behavior changed due to positive reinforcement. Give an example from his talk of how the birds' behavior changed due to observational learning. What is your reaction to this video?      Video Link : 2348   Reference American Psychological Association. (n.d.). Comparative psychology. Retrieved December 26, 2018, from https://dictionary.apa.org/comparative-psychology ... View more

It’s well-established that: brain cells survive for a time after cardiac arrest and even after declared death. some people have been resuscitated after cardiac arrest— even hours after, if they were linked to blood-oxygenating and heart-massaging machines. a fraction of resuscitated people have reported experiencing a bright light, a tunnel, a replay of old memories, and/or out-of-body sensations. For some, these experiences later enhanced their spirituality or personal growth. Recently, I enjoyed listening to and questioning a university physician who is launching a major multi-site study of cardiac arrest, resuscitation, and near-death experiences. As a dualist (one who assumes mind and body are distinct, though interacting), he is impressed by survivors’ reports of floating up to the ceiling, looking down on the scene below, and observing efforts to revive them. Thus, his study seeks to determine whether such patients can—while presumably separated from their supine body—perceive and later recall images displayed on an elevated, ceiling-facing iPad. Care to predict the result? My own prediction is based on three lines of research: Parapsychological efforts have failed to confirm out-of-body travel with remote viewing. A mountain of cognitive neuroscience findings link brain and mind. Scientific observations show that brain oxygen deprivation and hallucinogenic drugs can cause similar mystical experiences (complete with the tunnel, beam of light, and so forth). Thus, I expect there will be no replicable evidence of near-death minds viewing events remote from the body. Setting my assumptions and expectations aside, I asked the physician-researcher about some of his assumptions: For how long do you think the mind would survive clinical death? Minutes? Hours? Forever? (His answer, if I understood, was uncertainty.) When resuscitated, the mind would rejoin and travel again with the body, yes? When the patient is wheeled to a new room, the mind rides along? (That assumption was not contested.) What about the Hiroshima victims whose bodies were instantly vaporized? Are you assuming that–for at least a time—their consciousness or mind survived that instant and complete loss of their brain and body? (His clear answer: Yes.) That made me wonder: If a mind could post-date the body, could it also predate it? Or does the body create the mind, which grows with it, but which then, like dandelion seeds, floats away from it? The brain-mind relationship appeared in another presentation at the same session. A European university philosopher of mind argued that, in addition to the dualist view (which he regards as “dead”) and the reductionist view (Francis Crick: “You’re nothing but a pack of neurons”), there is a third option. This is the nonreductive physicalist view—“nonreductive” because the mind has its own integrity and top-down causal properties, and “physicalist” because the mind emerges from the brain and is bound to the brain. The 20th century’s final decade was “the decade of the brain,” and the 21st century’s first decade was “the decade of the mind.” Perhaps we could say that today’s science and philosophy mark this as a decade of the brain-mind relationship? For these scholars, there are miles to go before they enter their final sleep—or should I say until their body evicts their mind? Addendum for those with religious interests: Two of my friends—British cognitive neuroscientist Malcolm Jeeves and American developmental psychologist Thomas Ludwig—reflect on these and other matters in their just-published book, Psychological Science and Christian Faith. If you think that biblical religion assumes a death-denying dualism (a la Plato’s immortal soul) prepare to be surprised. ... View more

While it had been common for astronauts to spend six months at the ISS, NASA wanted to know what happens when humans spend even longer in space. Depending on the orbit trajectory chosen – which depends on how much fuel you want to take with you – a trip to Mars could take 7 to 9 months (Carter, n.d.). And then once you get there, you probably want to spend some time there. Heck, I spend more than a few days in Australia when I travel there, and that’s just 7,744 miles/12,462 km. And then you have to travel home from Australia – I mean, Mars. If you’re NASA and you have identical twin astronauts, there’s only one reasonable thing to do. You put together a team of researchers who are experts in human physiology, behavioral health, microbiology, and epigenetics to find out everything you can about the twins today. Next, you send one of them into space for twelve months. When the astronaut comes back to earth, repeat the measurements for both astronauts. This is NASA’s Twin Study. Mark Kelly* was the twin who stayed on earth; Scott Kelly was the twin who spent a year aboard the International Space Station (ISS)**. In January, 2018, NASA shared some preliminary research findings from their twin study.   Another interesting finding concerned what some call the “space gene”, which was alluded to in 2017. Researchers now know that 93% of Scott’s genes returned to normal after landing. However, the remaining 7% point to possible longer term changes in genes related to his immune system, DNA repair, bone formation networks, hypoxia, and hypercapnia. This makes it sound like Scott’s genes underwent some kind of change. Journalists grabbed hold of this and declared that Scott and Mark were no longer twins since their DNA was not the same. This was not what the researchers meant. NASA clarified: Mark and Scott Kelly are still identical twins; Scott’s DNA did not fundamentally change. What researchers did observe are changes in gene expression, which is how your body reacts to your environment. This likely is within the range for humans under stress, such as mountain climbing or SCUBA diving. What changed were not Scott’s genes, but rather his gene expression – in other words, his epigenetic code. A Brief History of Everyone Who Ever Lived by scientist and science writer Adam Rutherford is a nice summary of what we know, what we don’t know, and what we would like to know about genetics and, to a lesser extent, epigenetics.  Our epigenome is what turns genes on and off. Women who have two X chromosomes (that’s most of us) have all the genes on one X chromosome in each of our cells turned off. “In mammals, epigenetic modifications tend to get reset each generation, but some, very limited, rare epigenetic tags appear to be passed down from parent to child, at least for a couple of generations.”  Pregnant women who starved in the Netherlands during the winter of 1944 gave birth to low-birthweight babies (no surprise) who then grew up to give birth to babies who were high-birthweight (surprise). Other research in a rural Swedish community with variable harvests found that boys who experienced a lean year just before entering puberty were more likely to have grandsons – yes, grandsons – who lived longer. But most epigenetic changes are temporary (Rutherford, 2017). In the case of reporting that astronauts Mark and Scott Kelly were no longer identical twins, the journalists were merely reporting what they understood the NASA press release to be saying, so I’m not going to fault them. Earlier this month we read headlines declaring that despite years of research showing that the adult human hippocampus produces stem cells that grow into new neurons, that a new study declares that’s not the case at all. I was poised to pounce on journalists for getting this wrong. But I can’t. Once again, it’s the Public Relations department, this time at the University of California at San Francisco. Now UC San Francisco scientists have shown that in the human hippocampus – a region essential for learning and memory and one of the key places where researchers have been seeking evidence that new neurons continue to be born throughout the lifespan – neurogenesis declines throughout childhood and is undetectable in adults (Weiler, 2018). Rutherford (2017) reminds us that “[j]ournals are not all equal, and publication in a journal is not a mark of truth, merely that the research has passed the standard that warrants entering formal literature and further discussion with other scientists.” This is worth hammering into the heads of our students, our students who are the future writers of press releases, the future writers of news articles, and the future readers of those new articles. Our science journals are just one huge chat room. "Hey! This is what I found!" "Huh. How did find that?" "What if we looked at it this way instead?" "Anna used this other method and found something different. Anyone know why that would produce different results?" With additional research, we may discover that, indeed, the human hippocampus does not produce new neurons. And we may discover that living in space where a person is subject to the radiation equivalent of 10 chest x-rays a day (Kelly, 2017) does indeed change one’s genes, and not just the epigenetic code. Those who turn to science for definitive answers may find the responses couched in probabilities less than satisfying. But that’s how science works. Here’s a cautionary tale: Everyone knows that tongue-rolling is genetic. If you can roll your tongue, you have the dominant allele for tongue-rolling. As it turns out, everyone is wrong. The research was easy to do. Find a bunch of identical twins and see who could roll their tongues and who couldn’t. If tongue-rolling were completely genetic, each twin pair should be, well, identical in their tongue-rolling ability. Philip Matlock (1952) looked in the mouths of 33 pairs of twins. In 7 pairs, one twin could tongue-roll while the other one could not. And, yes, that date is right; he did this research in 1952. Similar studies in the 1970s found similar results (Martin, 1975; Reedy, Szczes, & Downs, 1971). If you had asked me last week, “Hey, Sue, is tongue-rolling simply controlled by our genes?” I would have said yes. But now my response is more nuanced. “There’s likely a gene or set of genes that controls it, but there is also probably an epigenetic code that turns that gene or genes on or off for different people. Let me tell you about this interesting research done with identical twins…” The more I learn, the less confidence I have in what I have always known to be true. “Half of what I’m going to tell you is wrong, but I don’t know which half.” I love this quote (or paraphrase?) as it nicely captures the moving nature of science, but I can’t find the origin – and I find that very fitting. My memory says it was something Paul Meehl said to his students, but I can’t find any such reference. A Psychology Today blogger credits an uncited and unnamed surgeon. If you know the origin, please contact me. References Carter, L. (n.d.). If Mars is only about 35-60 million miles away at close approach, why does it take 6-8 months to get there? (Intermediate). Retrieved from http://curious.astro.cornell.edu/physics/64-our-solar-system/planets-and-dwarf-planets/mars/267-if-mars-is-only-about-35-60-million-miles-away-at-close-approach-why-does-it-take-6-8-months-to-get-there-intermediate Kelly, S. (2017). Endurance: A year in space, a lifetime of discovery. New York City: Knopf. Martin, N. G. (1975). No evidence for a genetic basis of tongue rolling or hand clasping. Journal of Heredity, 66(3), 179–180. https://doi.org/doi.org/10.1093/oxfordjournals.jhered.a108608 Matlock, P. (1952). Identical twins discordant in tongue-rolling. Journal of Heredity, 43(1), 24. https://doi.org/https://doi.org/10.1093/oxfordjournals.jhered.a106251 Reedy, J. J., Szczes, T., & Downs, T. D. (1971). Tongue rolling among twins. Journal of Heredity, 62(2), 125–127. https://doi.org/doi.org/10.1093/oxfordjournals.jhered.a108139 Rutherford, A. (2017). A brief history of everyone who has ever lived. New York City: The Experiment. Weiler, N. (2018). Birth of new neurons in the human hippocampus ends in childhood. Retrieved March 24, 2018, from https://www.ucsf.edu/news/2018/03/409986/birth-new-neurons-human-hippocampus-ends-childhood **************** *Mark Kelly’s wife is Gabrielle Giffords, the US Representative from Arizona who survived an assassination attempt in 2011.   **”at the International Space Station” – I had a hard time deciding on the right preposition to use. Can one be on a space station if one is really floating inside it, except when Velcro-ed to a wall? In seemed to be a better choice, but felt clunky when I read it. I was ready to settle for at. NASA dodges the entire question and uses “aboard the ISS.” If aboard is good enough for NASA, it’s good enough for me. I’m confident we’ll get this figured out before we head to Mars. ... View more