Yawns are more contagious among people with closer relationships.
163
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
In one day, adult lungs move about 10,000 litres of air.
11
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Your thumb is about the same size as your nose.
124
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307