Raccoons smartly crack puzzles, sperm struggles in space, and a lost Archimedes page reappears

Raccoons trash pandas are more than just pests rummaging through bins. Scientists at the University of British Columbia tested 20 captive raccoons with a clear box full of obstacles like latches and dials hiding a marshmallow prize. The team noticed something unexpected the raccoons didn’t just grab the snack and stop. They kept probing every single lock, even after solving it. Easy puzzles got more playful exploration, while tough ones made them stick to what worked. This suggests raccoons balance curiosity with effort, treating problem-solving like a game where checking all options is half the fun. Space travel sounds exciting until you realize human sperm might get lost on the way to the egg. Researchers in Australia simulated zero gravity to test how well sperm navigate. Under normal conditions, the cells zip straight to their target, but spin them around in microgravity and half get confused and fail to find the finish line. Even mouse embryos fertilized in space grew 30% fewer than usual. The small fix? A splash of progesterone, a natural hormone, helped sperm stay on course. Next up is testing if the Moon’s weaker gravity or spinning space stations could make a difference.Lost manuscripts hold secrets waiting to be uncovered. Modern tech like X-rays and multispectral scans have been digging up hidden texts from beneath later writing. In 2022, they revealed Hipparchus’s star catalog under a medieval Christian book and old Dead Sea Scroll fragments once thought blank. Now, a missing page from Archimedes’ ancient math treatises has turned up at a French museum. The parchment, reused in the 13th century for prayers and art, shows signs of more text buried underneath, ready for scholars to uncover with the same high-tech tools. Ravens are the ultimate gossip birds with a memory for wolf leftovers. A six-year study in Yellowstone tracked both wolves and ravens using GPS collars. Scientists expected ravens to drift behind wolf packs, sniffing out fresh kills. Instead, the birds flew straight to known hotspots, returning repeatedly to where wolves had dined before. Tracking data showed they rarely followed wolves for long distances or over large areas. It turns out ravens rely on memory just as much as they rely on wolf howls, proving these clever birds plan their scavenging routes like pros. Crepes might seem simple, but folding them perfectly follows strict math. A physicist from Cornell teamed up with his mom to test how many times a paper-thin pancake could fold without flipping back. They discovered the trick lies in a formula tied to thickness, stiffness, and gravity. A 26cm crepe about 1mm thick could fold four times, while a thicker tortilla of the same size could only manage two. This isn’t just about pancakes it’s food folding as a science lesson.