Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
When dragonflies mate, their tails form a love heart.
22
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23