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Curiosities

Biology, geology, deep ocean, evolution, and natural-world facts. Cross-domain wonder pieces.

70 articles · Curiosities

Curiosities

Axolotls can regrow entire limbs, parts of their heart, sections of their spinal cord, and even portions of their brain, and they do it without forming scar tissue, which is why labs from Vienna to Boston keep colonies of them alive specifically to figure out what humans lost

Axolotls regrow limbs, heart tissue, spinal cord and brain without forming scars. From Vienna's Hand2 discovery to a 2026 PNAS paper on the SP8 gene, here's why labs worldwide keep the Mexican salamander alive.

Curiosities

In 1901, sponge divers sheltering from a storm off the Greek island of Antikythera surfaced with a corroded bronze lump that sat in an Athens museum for decades before anyone realised it was a 2,000-year-old geared computer that could predict eclipses and track the Olympic Games

The Antikythera mechanism spent 2,000 years on the seabed and another 50 in a museum drawer before X-rays revealed it was a hand-cranked bronze computer that predicted eclipses, modelled the Moon's elliptical orbit, and tracked the schedule of the ancient Olympic Games.

Curiosities

A single cumulus cloud the size of a small village weighs roughly 500,000 kilograms, about the weight of 100 elephants, yet stays aloft because its water is dispersed as tiny droplets through air denser than the cloud itself

A fair-weather cumulus cloud the size of a small village holds about 500,000 kilograms of water — the mass of 100 elephants — yet floats because the droplets are scattered across a volume larger than a stadium and the warm air beneath is denser than the cloud spread through it.

Politics

It is a federal crime in America to sell a kidney to save a dying patient, yet a whole donated body cut into parts and shipped for research sits in a legal gap Congress never thought to close

The 1984 National Organ Transplant Act made it a federal felony to pay a donor family for a transplantable kidney. The same law left a parallel industry — whole bodies donated to non-transplant brokers and resold in pieces for thousands of dollars — entirely untouched.

Curiosities

Bowhead whales can live more than 200 years and their cells appear to repair DNA damage so efficiently that researchers studying them have found tumors that simply stop growing partway through, leaving the animal to swim the Arctic for another century unaffected

Bowhead whales can live more than 200 years, and a 2025 Nature paper from the University of Rochester shows their cells repair DNA breaks two to three times better than human cells — thanks to a cold-activated protein called CIRBP that may explain why tumors in these Arctic giants sometimes simply stop growing.

Mind

Beneath the streets of Paris lie roughly 200 kilometres of tunnels holding the bones of around six million people, moved underground starting in 1786 to relieve overflowing cemeteries, and only a small lit fraction is open to visitors who descend 20 metres below the city.

Beneath Paris lie around 200 kilometres of former limestone quarries holding the bones of an estimated six million people, transferred from overflowing cemeteries starting in 1786. Only about 1.5 kilometres of the network is open to visitors, twenty metres below the streets.

Curiosities

The Mariana snailfish lives nearly 8,000 metres below the Pacific surface at pressures that would crush a submarine, and survives because its bones are partly unossified and its cells are packed with a molecule called TMAO that keeps proteins from collapsing

At nearly 8,000 metres below the Pacific surface, the Mariana snailfish survives pressures that would crush a submarine — thanks to a partly unossified skeleton, TMAO-saturated cells, and a liver rebuilt for famine.

Curiosities

A single bolt of lightning that crossed Texas, Louisiana, and Mississippi in April 2020 stretched 768 kilometres end to end, once the longest single flash ever recorded and roughly the distance from New York City to Columbus

On 29 April 2020, a single lightning bolt crossed Texas, Louisiana, and Mississippi end to end — 768 kilometres of continuous discharge in under seven seconds, the longest flash ever recorded. Here is what scientists now know about how such megaflashes start.