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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

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There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

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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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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Thorax Posterior view of human body Thorax Posterior view of human body
Heat Stress and Wind Chill: Indices of Human Discomfort Heat Stress and Wind Chill: Indices of Human Discomfort
Structure of human OGG1 with either guanine or 8-oxoguanine bound flipped out and bound Structure of human OGG1 with either guanine or 8-oxoguanine bound flipped out and bound
Spectrum of Food Security Food insecurity and hunger are points along the continuum Spectrum of Food Security Food insecurity and hunger are points along the continuum
Some obesity genes in the human genome. The green triangles represent single genes in which obesity Some obesity genes in the human genome. The green triangles represent single genes in which obesity
A human mitotic chromosome preparation processed A human mitotic chromosome preparation processed
Video: Olfaction. or the sense of smell

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