Crocodiles swallow stones to help them dive deeper.
55
Termites work 24 hours per day and they do not sleep.
57
There are over 58 million dogs in the U.S!
76
In Brazil, there's a species of cockroach that eats eyelashes, usually those of young children while they are asleep.
151
Humans and dolphins are the only species that have sex for pleasure.
61
Ducks will only lay eggs early in the morning.
36
Dolphins sleep with one eye open!
52