Evolution: A Scientific American ReaderScientific American University of Chicago Press, 2008 M09 15 - 312 páginas From the Scopes “Monkey Trial” of 1925 to the court ruling against the Dover Area School Board’s proposed intelligent design curriculum in 2005, few scientific topics have engendered as much controversy—or grabbed as many headlines—as evolution. And since the debate shows no signs of abating, there is perhaps no better time to step back and ask: What is evolution? Defined as the gradual process by which something changes into a different and usually more complex and efficient form, evolution explains the formation of the universe, the nature of viruses, and the emergence of humans. A first-rate summary of the actual science of evolution, this Scientific American reader is a timely collection that gives readers an opportunity to consider evolution’s impact in various settings. |
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... researchers believe the density is greater than this minimum value. So-called dark matter would make up the difference. A strongly de- fended argument holds that the universe is just dense enough that in the remote future the expansion ...
... researchers anticipated correctly that the apparent temperature of the radiation would be low. In the 1930s Richard C. Tolman of the California Institute of Technology showed that the temperature of the cosmic background would diminish ...
... researchers improve techniques for measuring the mass of the universe, we may learn whether the present ex- pansion is headed toward a big chill or a big crunch. In the near future, we expect new experiments to provide a better un ...
... researchers observed strong absorption of ultravi- olet light in the spectra of quasars that date from about 900 million years after the big bang. The results suggest that the last patches of neutral hy- drogen gas were being ionized at ...
... Researchers will also concentrate on extreme ob- jects that may hold clues to physical processes that are not yet fully un- derstood. One such object is the gamma-ray burster, which emits, for a few seconds, as much power as a billion ...
Contenido
Cellular Evolution | 85 |
Dinosaurs and Other Monsters | 169 |
Human Evolution | 249 |
Contents | 362 |
Illustration Credits | 364 |
The Evolution of the Universe | 1 |
Cellular Evolution | 85 |
Dinosaurs and Other Monsters | 169 |
Human Evolution | 249 |