A hard working adult sweats up to 4 gallons per day.
39
Only 2% of the Earth's population are natural redheads.
13
Yu Youzhen, a Chinese millionaire, works as a street sweeper for the sanitation department to set an example for her children.
11
The offspring of two sets of identical twins are legally cousins but genetically siblings.
63
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Humans blink over 10,000,000 times a year!
97
Every workday, 6.7 million people commute to Manhattan!
26