When cats are happy, they may squeeze their eyes shut.
10
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
9
Condoms were originally made of animal intestines or linen.
347
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255