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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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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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Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Inflammation. Inflammation is characterized by the presence of swelling, redness, heat, and pain. Sw Inflammation. Inflammation is characterized by the presence of swelling, redness, heat, and pain. Sw
A thermostat stuck in the open position caused the engine to operate too cold. The vehicle failed ... A thermostat stuck in the open position caused the engine to operate too cold. The vehicle failed ...
Inflammation of the oropharynx and petechiae (small red spots) on the soft palate caused by strep ... Inflammation of the oropharynx and petechiae (small red spots) on the soft palate caused by strep ...
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Video: Bone cells and tissues - tissue composition and cells

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