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Biology, geology, deep ocean, evolution, and natural-world facts. Cross-domain wonder pieces.
70 articles · Curiosities
Cymothoa exigua is a parasitic isopod that enters a fish through the gills, drinks the blood out of its tongue until the tongue withers away, and then attaches to the stub and spends the rest of its life acting as a functional replacement tongue — the only known case in biology of a parasite replacing a host organ.
The bitter compounds in kale, broccoli and green tea are plant defence weapons — and the reason vegetables extend human life. A look at hormesis, the gut bacteria that decide who benefits, and why the vegetables engineered to taste mild may deliver less of what makes them medicine.
Astronauts return from long missions up to 5 centimetres taller as their spinal discs swell in the absence of gravity. Within 48 hours of landing, the spine begins compressing again — and the injury risk that follows can last for years.
Cuttlefish have monochromatic vision but produce some of the most accurate colour camouflage in nature. New computer-vision studies of their chromatophores are finally showing how.
After 340 days on the ISS, astronaut Scott Kelly returned to Earth to find his own home felt staged, his skin broke out from soft furniture, and the smell of rain on his patio hit him like a physical event — a reentry the launch had never prepared him for.
The vestibular system in each inner ear works a thousand times a second for a human lifetime without ever asking to be noticed. In orbit it goes silent, and the brain performs one of the fastest rewirings in adult neurology — a rewiring that reverses, painfully, the moment the capsule lands.
In 1965, Okinawa produced more centenarians per capita than anywhere on Earth. By 2000, its young men were dying earlier than the Japanese average. The unplanned experiment on one island reveals what the wellness industry keeps missing about longevity.
A lightning bolt heats the narrow channel of air it travels through to roughly 30,000°C — about five times hotter than the surface of the Sun. Thunder is that channel exploding outward faster than the speed of sound, then decaying into the rumble you hear seconds later.
Sperm whales routinely dive nearly 2,250 metres on a single breath, using a head packed with waxy spermaceti oil that solidifies under cold and pressure to help drag them toward squid they hunt in total darkness.
Since 1990, most of the world's cheese has been made with chymosin produced by genetically modified microbes in industrial fermentation tanks — not traditional calf rennet. The switch was legal, unlabelled, and almost invisible to consumers. Now a new fight over ingredient transparency in the US is about to drag it into the open.
Greenland sharks swim at a foot per second, grow a centimeter a year, and don't reach sexual maturity until roughly 150 years old — meaning adults reproducing today were born before the American Revolution.
On April 29, 2020, a single bolt of lightning stretched 768 kilometres across Texas, Louisiana, and Mississippi — long enough to force the World Meteorological Organization to rewrite what a lightning strike can be.
