The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
The human brain doesn't stop developing until about 25 years old.
102
Every year your body replaces 98% of your atoms.
119
The average sperm cell swims at 8 inches per hour.
76
The human brain has the capacity to store everything that you experience.
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