When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
A puppy is born blind, deaf, and toothless.
16
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492