Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Alligators can live up to 100 years.
337
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The human brain is more active during sleep than during the day.
28
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
You can only remember 4 things at a time.
31
It would take more than 150 years to drive a car to the sun.
569