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Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican
Pupil assessment; A, starting position, with penlight to side of pupil; Pupil assessment; A, starting position, with penlight to side of pupil;
Effect of changing a set point for hypothalamic values Effect of changing a set point for hypothalamic values
The upper intake manifold, often called a plenum, attaches to the lower intake manifold. The upper intake manifold, often called a plenum, attaches to the lower intake manifold.
Five layers or sheaths called koshas in Ayurvedic philosophy. Five layers or sheaths called koshas in Ayurvedic philosophy.
Constructing a Three-Point Recombination Map Constructing a Three-Point Recombination Map
Video: Contraction and Relaxation Animation

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