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.
21
In older people, memory is best early in the morning and then declines during the late afternoon.
33
It takes approximately 12 hours for food to entirely digest.
93
About 400 different kinds of microbes live on and in the human body.
-3
Lack of water is the #1 trigger of daytime fatigue.
148
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
Dating back to the 1600's, thermometers were filled with Brandy instead of mercury.
16
The average tastebud lives only 10 days before it dies and is replaced by a new one.
15