Bats sleep 18-20 hours per day.
5
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
A dairy cow can produce more milk when listening to music.
446
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
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
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18