If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
The human eye blinks an average of 4,200,000 times a year.
233
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
The human brain doesn't stop developing until about 25 years old.
102
By weight, Bone is five times stronger than steel.
417
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