After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Every human spent about half an hour as a single cell.
144
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Your thumb is about the same size as your nose.
124
The human brain is more active during sleep than during the day.
28