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
About 400 different kinds of microbes live on and in the human body.
-3
There is a disease called ichthyosis that turns the skin scaly like a fish.
90
Kissing an infection-free partner is good for your teeth!
141
You can reschedule your sleeping pattern by not eating 12-16 hours before you want to be awake. Upon eating after this time period, your internal clock will reset to a new day, with the time of your first meal being interpreted as "morning".
11
The male fetus is capable of attaining an erection during the last trimester.
75
The average sperm cell swims at 8 inches per hour.
76
A person infected with the SARS virus, has a 95-98% chance of recovery.
23