Condoms were originally made of animal intestines or linen.
347
There are approximately three chickens for every human on Earth.
13
Drivers kill more deer than hunters do.
660
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Cats and dogs can hear ultrasound.
350