Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
The reindeer is the only mammal that can see UV light.
17
A domestic cat can sprint at about 31 miles per hour.
274
Denmark has twice as many pigs as there are people.
66
Alligators can live up to 100 years.
337