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Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Deimos in color on February 21, 2009 by the same (not to scale) Deimos in color on February 21, 2009 by the same (not to scale)
Additive Color Mixing and Paint Mixing Additive Color Mixing and Paint Mixing
Color Coding in the Retina Color Coding in the Retina
Variations in Ocean Water Temperature With Depth Variations in Ocean Water Temperature With Depth
Four color theorem Four color theorem
No gene interaction in the production of feather color in budgerigar parakeets No gene interaction in the production of feather color in budgerigar parakeets
Video: Supine Position

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