The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Mushrooms are more closely related to humans than they are to plants.
47
Your fingernails grow faster in summer.
744
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Pain occurs when sounds are above 130 db.
124
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human brain uses approximately as much energy as a 10 watt light bulb.
120