Condoms were originally made of animal intestines or linen.
347
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6
The largest earthworm on record was found in South Africa and measured 22 feet.
151