You have no sense of smell when you're sleeping!
72
In older people, memory is best early in the morning and then declines during the late afternoon.
33
While 7 men in 100 have some form of color blindness, only 1 woman in 1,000 suffers from it.
50
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
When a person dies, hearing is usually the last sense to go.
124
It takes approximately 12 hours for food to entirely digest.
93
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