Tigers can see 6 times better at night than humans.
305
Yawns are more contagious among people with closer relationships.
163
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
You can't tickle yourself.
29
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
There are about 255 babies born worldwide every minute.
46