Condoms were originally made of animal intestines or linen.
347
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
11
Cats recognise the voice of their owner, but never evolved to care.
22
A dairy cow can produce more milk when listening to music.
446