101 Things You Don't Know About Science and No One Else Does - download pdf or read online

By James Trefil Physics Professor

ISBN-10: 0395877407

ISBN-13: 9780395877401

James Trefil takes the reader on an exciting travel around the borders of present medical knowledge-from astronomy to genetics, from info expertise to cosmology, the nice contested questions that preoccupy researchers at the present time and may turn into headlines the next day. In stylish, witty three-page summations, Dr. Trefil "makes feel of technological know-how for the remainder of us" (Washington Post).

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Over a period of several minutes, the oxygen isotope would undergo radioactive decay and emit particles called positrons, which could be detected outside the body. Watching a PET scan, you could see regions of the brain ''light up" as they drew more blood for their tasks. More recently, radioactive markers have been attached to molecules that are known to interact only with certain types of receptors in specific cells. The result: a map of the locations in the brain where specific molecules do their work.

It is believed that the original AIDS virus, for example, was a mutated form of a virus that had previously affected only monkeys. All that was needed was for one hunter cutting his finger while skinning a monkey with the mutated virus to loose a deadly disease on the entire world. Want to think about a real nightmare? Imagine a virus like the one that causes AIDS, which leaves the host alive and able to spread the disease for years before he or she dies. Then imagine that the virus could spread through the air, like influenza and the common cold.

Reasoning like this shows that only a relatively small range of values of phenomena like the gravitational force or electrical charge will allow the possibility of life. In universes outside of this range, the questions can't be asked; the fact that they are being asked in our universe means we're within the range. " On the evolutionary side, the argument centers on whether, and to what extent, living systems have to be like the ones we observe on earth. For example, we know that the first reproducing cell was formed from molecules generated from inorganic material.

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101 Things You Don't Know About Science and No One Else Does Either by James Trefil Physics Professor


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