It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
99
Identical twins do not have identical fingerprints.
79
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
The average single man is one inch shorter than the average married man.
88
You will experience the billionth second of your life when you are 31 years old.
21
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973