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Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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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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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Oasis in space: earthrise over the moon's horizon. Oasis in space: earthrise over the moon's horizon.
A subdural hematoma. A meningeal vein is ruptured and blood has accumulated in the subdural space, p A subdural hematoma. A meningeal vein is ruptured and blood has accumulated in the subdural space, p
(A) Each bronchiole terminates in an alveolar sac, a group of alveoli; (B) alveoli encased by networ (A) Each bronchiole terminates in an alveolar sac, a group of alveoli; (B) alveoli encased by networ
In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han
It is important for new employees to know the location of all fire extinguishers. (C) Sweep the area ... It is important for new employees to know the location of all fire extinguishers. (C) Sweep the area ...
Monophyletic vs. paraphyletic group Monophyletic vs. paraphyletic group
Video: Interview with an Anorexic Woman (Part 1 of 2)

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