It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Every human spent about half an hour as a single cell.
144
A hard working adult sweats up to 4 gallons per day.
39
Forty percent of Americans have never visited a dentist.
33
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Someone on Earth reports seeing a UFO every three minutes.
180
The single biggest predictor of love is proximity.
30
Forty percent of American adults cannot fill out a bank deposit slip correctly.
155