It takes about 20 seconds for a red blood cell to circle the whole body.
102
By weight, Bone is five times stronger than steel.
417
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
A man's beard grows fastest when he anticipates sex.
239
A human being loses an average of 40 to 100 strands of hair a day.
133
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The human brain has the capacity to store everything that you experience.
4k
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191