In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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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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There are more bacteria in your mouth than there are people in the world.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
Image of a flower petal.
Flower
Flower
The correct statement about hormones-insulin and glucagon