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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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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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

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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Stem cell division and differentiation Stem cell division and differentiation
cell cell
Eukaryotic cell without labels Eukaryotic cell without labels
Phagocytosis. The cell engulfs and digests a bacterium. Phagocytosis. The cell engulfs and digests a bacterium.
The reference electrodes are shared by the Nernst cell and the pump cell. The reference electrodes are shared by the Nernst cell and the pump cell.
Photomicrographs comparing cheek epithelial cell nuclei Photomicrographs comparing cheek epithelial cell nuclei
Video: Optic Nerve and Optic Disk Animation (Part 1 of 2)

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