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Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

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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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Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

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Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

A comparison between chromosomes found in a normal human cell and a cancer cell from the same person A comparison between chromosomes found in a normal human cell and a cancer cell from the same person
The composition of DNA sequences that are found in the nuclear genome of humans The composition of DNA sequences that are found in the nuclear genome of humans
Arthritis. (a) Photograph of osteoarthritis within the joints of the fingers. Arthritis. (a) Photograph of osteoarthritis within the joints of the fingers.
Lie prone with your head turned to one side. Put your arms out to your sides and bend your elbows at ... Lie prone with your head turned to one side. Put your arms out to your sides and bend your elbows at ...
Types of Synovial Joints Types of Synovial Joints
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Video: New DNA Strand Replication

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