A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
52
The fingerprints of koala bears are virtually indistinguishable from those of humans, so much so that they could be confused at a crime scene.
73
By feeding hens certain dyes they can be made to lay eggs with multi-colored yolks.
40
The lifespan of mammals is about 1 and a half billion heartbeats.
127
Beavers have orange teeth!
23
A hummingbird weighs less than a penny.
1k
A cat can jump FIVE TIMES as high as it is tall!
371
