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Did you know?

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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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

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A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Cast of Isotelus rex, the largest known trilobite from the middle to upper Ordovician of North Ameri Cast of Isotelus rex, the largest known trilobite from the middle to upper Ordovician of North Ameri
Gorillas are the largest living primates. Gorillas are the largest living primates.
These illustrations show Ellen Craft, a slave with and without a disguise. She dressed “as a disting These illustrations show Ellen Craft, a slave with and without a disguise. She dressed “as a disting
First-order sensory neuron with encapsulated nerve endings First-order sensory neuron with encapsulated nerve endings
Sensory receptor synapses with first-order sensory neuron Sensory receptor synapses with first-order sensory neuron
Video: Sigmoidoscopy

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