Two dogs were among the Titanic survivors.
262
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
When cats are happy, they may squeeze their eyes shut.
10
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20