How did we do it? Plus, how to use AI safely when traveling; earliest drag balls; prehistoric cave art
|  | Monday, June 5, 2023 | | | | |
 | PHOTOGRAPH BY LENNART NILSSON, TT/SCIENCE PHOTO LIBRARY
| | Before you dismiss Ariel and The Little Mermaid as a fairy tale, consider this: We once could breathe through water, too.
Of course, we ditched that superpower suddenly. In a complicated maneuver, the moment we emerged from the watery womb (pictured above), we switched to our lungs to frantically gulp in oxygen. | | | |
 | | PHOTOGRAPH BY BRUNO BARBEY/MAGNUM | | | |
 | | PHOTOGRAPH BY MAGNUS WENNMAN | | | Advice for a good night’s sleep: Dark, cool room, no blue light, no food before bed. But the science of sleep—and why a solid rest keeps us healthy—reveals a much more in-depth journey. Above, people sleep while composer Max Richter leads a performance of Sleep, an eight-hour, scientifically informed piece that guides listeners through a rejuvenating rest. | | | |
 | | PHOTOGRAPH BY GJLP - CNRI, SCIENCE PHOTO LIBRARY | | No, you can’t detox your uterus: Misinformation regarding polycystic ovary syndrome is abundant on social media, so we busted some myths. Like: no, women with PCOS don’t need to cut out gluten and dairy, and no, women can’t detox their PCOS uterus with tea. (Above, an X-ray showing calcified cysts in a woman's ovary.)
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 | | MIKE P. SHEPHERD/AGE FOTOSTOCK | | | A Stone Age surprise: Medieval accounts hinted at an oasis of treasures in the vast, forbidden desert of present-day southwestern Egypt. Instead of gold and jewels, explorers found ancient etchings in the caves of Gilf Kebir (above, giant beasts that some believe are elephants). Alongside those etchings, myriad pieces of prehistoric art, Nat Geo reports. | | | |
Today’s soundtrack: Growing Up, The Linda Lindas
Thanks for reading today’s newsletter! It was curated and edited by Jen Tse, Hannah Farrow, and David Beard. Want to let us know your thoughts? Send away: david.beard@natgeo.com. Happy trails!
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