There are more nerve cells in one human brain than there are stars in the Milky Way.
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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
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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.
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The average adult has about 21 square feet of skin.
Red-Green Color Blindness Is a Sex-Linked Trait in Humans
An “Intermediate-Mass” Black Hole
Biston betularia betularia morpha carbonaria, the black-bodied peppered moth