The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
Dogs have been man's pet for over 14,000 years.
224
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23