Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Tigers can see 6 times better at night than humans.
305
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Poor eyesight (myopia) is associated with higher IQ.
232
There are about 255 babies born worldwide every minute.
46
Yawns are more contagious among people with closer relationships.
163