Cats recognise the voice of their owner, but never evolved to care.
22
The seahorse is the only fish to have a neck.
12
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
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
Condoms were originally made of animal intestines or linen.
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