The poison-arrow frog has enough poison to kill about 2,200 people!
55
It's possible to lead a cow upstairs, but not downstairs.
50
Cuban rescue workers use sniffer rabbits to find people in collapsed buildings.
10
Catgut comes from sheep not cats.
11
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
Tigers can see 6 times better at night than humans.
305
Crocodile babies don't have sex chromosomes; the temperature at which the egg develops determines gender.
45