In one day, adult lungs move about 10,000 litres of air.
11
Only humans shed emotional tears.
331
Babies crawl an average of 200m a day.
212
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Yawns are more contagious among people with closer relationships.
163