If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
The human eye blinks an average of 4,200,000 times a year.
233
The human brain uses approximately as much energy as a 10 watt light bulb.
120
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
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111