It takes about 20 seconds for a red blood cell to circle the whole body.
102
The human eye blinks an average of 4,200,000 times a year.
233
There are about 255 babies born worldwide every minute.
46
Your fingernails grow faster in summer.
744
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Tigers can see 6 times better at night than humans.
305
The human body contains over a billion miles of DNA.
147