A scorpion can hold its breath for up to 6 days.
19
Alligators can live up to 100 years.
337
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The seahorse is the only fish to have a neck.
12
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
The colossal squid has the largest eyes in the world.
4
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
The elephant brain weighs about 6,000g.
274