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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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.