Word: geneses
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Two possible answers have been suggested. One is that males are necessary to combat disease: without sexual reproduction, a clonal species is vulnerable to increasing parasitic attack. The other theory holds that sex helps purge the species of genetic mutations by shuffling the genes in each generation.
Untangling this metabolic mess will probably take decades. But given the immense profits waiting for whoever can invent a safe, effective weight-control substance, drug companies aren't waiting. With the clues they have in hand, pharmaceutical firms are now investigating about 60 compounds, most of them based on some...
So it seems likely that for a while at least we'll keep getting fatter. We can't undo evolution, and we haven't found a way to fool Mother Nature--yet. But before the 21st century is half over, with the body's fat-centric metabolism laid bare and...
Then there are the biological weapons. The 20th century saw the creation of great weapons based on the principles of nuclear physics; the 21st century will see great weapons based on the knowledge of DNA and the genetic code. During the 1980s, the Soviet Union used rudimentary genetic engineering to...
Scientists have found a type of bacterium that is virtually indestructible. It's called Deinococcus radiodurans ("terrible berry that survives radiation"). This bug can live in a blast of gamma rays that is the equivalent of thousands of lethal human doses--radiation so strong it cracks glass. Scientists have found...