Learn why more humans are growing an extra artery; emotional hangovers; and the drawbacks of energy-efficient LED streetlamps. More humans are growing an extra artery, which shows we're still evolving by Cameron Duke  Lucas, T., Kumaratilake, J., & Henneberg, M. (2020). Recently increased prevalence of the human median artery of the forearm: A microevolutionary change. Journal of Anatomy, 237(4), 623–631. https://doi.org/10.1111/joa.13224  McRae, M. (2021). More And More Humans Are Growing an Extra Artery, Showing We’re Still Evolving. ScienceAlert. https://www.sciencealert.com/more-humans-are-growing-an-extra-artery-in-our-arms-because-we-re-still-evolving  Emotional Hangovers Are Real, And They're Not What You Think by Sam Suarez  Waude, A. (2016, February 23). Emotion And Memory: How Do Your Emotions Affect Your Ability To Remember Information And Recall Past Memories? Psychologistworld.com; Psychologist World. https://www.psychologistworld.com/emotion/emotion-memory-psychology  ‌Mather, M., & Sutherland, M. (2012). The selective effects of emotional arousal on memory. Https://Www.apa.org. https://www.apa.org/science/about/psa/2012/02/emotional-arousal  Tambini, A., Rimmele, U., Phelps, E. A., & Davachi, L. (2016). Emotional brain states carry over and enhance future memory formation. Nature Neuroscience, 20(2), 271–278. https://doi.org/10.1038/nn.4468  ‌New York University. (2016, December 27). Is there such a thing as an emotional hangover? Researchers find that there is. PsyPost; PsyPost. https://www.psypost.org/2016/12/thing-emotional-hangover-researchers-find-46675  Energy-efficient LED streetlamps are bad news for insect populations by Cameron Duke  Boyes, D. H., Evans, D. M., Fox, R., Parsons, M. S., & Pocock, M. J. O. (2021a). Street lighting has detrimental impacts on local insect populations. Science Advances, 7(35), eabi8322. https://doi.org/10.1126/sciadv.abi8322 Portree, D. S. F. (2002, October). Flagstaff’s Battle for Dark Skies. The Griffith Observer. http://www2.lowell.edu/users/wes/GriffithObserver1crop.pdf Sharon, W. (2007). STUDYING THE ECOLOGICAL IMPACTS OF LIGHT POLLUTION ON WILDLIFE. StarLight: A Common Heritage. https://www.researchgate.net/profile/Sharon-Wise-3/publication/242297944_STUDYING_THE_ECOLOGICAL_IMPACTS_OF_LIGHT_POLLUTION_ON_WILDLIFE_AMPHIBIANS_AS_MODELS/links/00b7d53bd619157183000000/STUDYING-THE-ECOLOGICAL-IMPACTS-OF-LIGHT-POLLUTION-ON-WILDLIFE-AMPHIBIANS-AS-MODELS.pdf Light Pollution Effects on Wildlife and Ecosystems - International Dark-Sky Association. (2016, September 12). International Dark-Sky Association. https://www.darksky.org/light-pollution/wildlife/  Main, D. (2019, February 14). Why insect populations are plummeting—and why it matters. Animals; National Geographic. https://www.nationalgeographic.com/animals/article/why-insect-populations-are-plummeting-and-why-it-matters?loggedin=true  Follow Curiosity Daily on your favorite podcast app to learn something new every day withCody Gough andAshley Hamer. Still curious? Get exclusive science shows, nature documentaries, and more real-life entertainment on discovery+! Go to https://discoveryplus.com/curiosity to start your 7-day free trial. discovery+ is currently only available for US subscribers. See omnystudio.com/listener for privacy information.