The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
Did you know?
The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.
The digestive system.
How to solve two inequalities at once (Part 2)
Estimates of Heritability for Traits in Different Organisms part 2