Cats and dogs can hear ultrasound.
350
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
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Dolphins have names for one another.
18
Two dogs were among the Titanic survivors.
262