When cats are happy, they may squeeze their eyes shut.
10
Condoms were originally made of animal intestines or linen.
347
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
A group of kittens is called a "kindle".
10
Alligators can live up to 100 years.
337
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23