The world's smallest mammal is the bumblebee bat of Thailand, weighing less than a penny.
60
A killer whale's heart beats 30 times a minute under water, 60 times a minute on the surface.
30
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6
A scorpion can hold its breath for up to 6 days.
19
Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
19
Under extreme stress, some octopuses will eat their own arms.
198
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Jumping fleas can accelerate 50 times faster than the space shuttle.
218