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Asthma cases in Americans are about 75% higher today than they were in 1980.

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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Erythrocytes (red blood cells) moving through a capillary in single file. Erythrocytes (red blood cells) moving through a capillary in single file.
Immortal HeLa Cells Immortal HeLa Cells
Raphael, Studies for The Alba Madonna (recto). Raphael, Studies for The Alba Madonna (recto).
Descending limbs of Hadley cells are the sites of the world’s major deserts Descending limbs of Hadley cells are the sites of the world’s major deserts
1.6 Organisms are made up of cells, each of which contains an identical set of genes. 1.6 Organisms are made up of cells, each of which contains an identical set of genes.
Fossil Prokaryotic Cells Fossil Prokaryotic Cells
Video: Glucose Evaluation Procedure

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