Renowned climate scientist Katharine Hayhoe explains why climate change isn’t as “doom and gloom” as you might think, and gives tips for how to talk about it to inspire action. Plus: learn about how to overcome “bedtime procrastination.”

Learn which is more important, sleep or exercise; why you’ve never seen a picture of the whole Milky Way; a trick for falling asleep any time, anywhere, with a military-tested trick; and why your voice sounds different when you hear a recording of yourself.

Learn about how and why we study fruit flies with some help from Stephanie Mohr, author of the new book “First in Fly: Drosophila Research and Biological Discovery.” You’ll also learn why we still make pennies here in the U.S., and why science says your personality completely changes over time.

Learn about why adding cold cream to your coffee keeps it hotter longer, why social identity can make people distrust the scientific consensus, and why you need self-compassion for self-improvement.

Learn why narcissism may come from insecurity, how lobster became a delicacy, and how astronauts clean their underwear.

Learn about how to tell when your body is running low on key vitamins; how Neanderthals mourned their dead; and why you should NOT pre-rinse your dishes before putting them in the dishwasher.

Learn about how research into senescent cells and senolytic drugs could change aging. Plus: the Milky Way’s broken arm.

Author Bill Sullivan discusses the surprising ways your genes can influence aggressive and violent tendencies. Then, learn about how it’s possible that anglerfish can fuse to their mates; and box breathing, a Navy SEAL technique for reducing stress and staying calm.

Learn about why there’s no such thing as a sugar rush; why it took more than 40 years to see NASA’s high-resolution images of the Moon; and, how dogs use referential signals to communicate with humans.

Learn about the similarities between problems facing ancient and modern cities from author Monica L. Smith, an archaeologist and professor in the department of anthropology at UCLA. You’ll also learn about whether you have a dominant ear.

Learn about how your romantic attachment style affects your finances; the surprising reason why some amphibians glow; and why laughter might really be the best medicine.

Learn about how someone can change their identity (and their mind); and “mushballs” on Uranus and Neptune. Plus: trivia!

Learn about the golden records NASA launched into space with their Voyager 1 and Voyager 2 probes; the 5 most bacteria-ridden spots in your office; and why cats love boxes, according to science.

Learn about the shadowy “red market” of bones, with help from author Brian Switek. You’ll also learn why venting your anger is unhealthy, and what you should do instead; and, why asparagus makes your pee smell weird.

Learn about whether the exercise trend of “muscle confusion” really works; how structural colors give animals their vibrant hues; and why the way you dance is just as unique as your fingerprint.