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Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

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If you could remove all of your skin, it would weigh up to 5 pounds.

Evolutionary change in the tetrapod lineage, showing a transitional form. Evolutionary change in the tetrapod lineage, showing a transitional form.
Palpating the thyroid gland from behind the patient is a most effective way of assessing the gland f Palpating the thyroid gland from behind the patient is a most effective way of assessing the gland f
Cumulative change for six personality-trait domains across the life course show distinct patterns. Cumulative change for six personality-trait domains across the life course show distinct patterns.
Marx's Model of Historical Change Marx's Model of Historical Change
A highly sulfated glycosaminoglycan is heparin A highly sulfated glycosaminoglycan is heparin
Climate change by international treaty Climate change by international treaty
Video: Embryonic development - Week 4

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