In 1943, Luria and Delbrück used a phage-resistance assay to establish spontaneous mutation as a driving force of microbial diversity. Mutation rates are still studied using such assays, but these can only be used to examine the small minority of mutations conferring survival in a particular condition. Newer approaches, such as long-term evolution followed by whole-genome sequencing, may be skewed by mutational ‘hot’ or...
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Uber slashes rates in 100 cities due to slow demand; Seattle keeps current prices
Uber is cutting prices in more than 100 North American cities to adjust for what are typically slow winter months. The cuts, which go into effect this weekend and range from 10 to 35 percent — even up to 50 percent for airport rides in New Jersey — mean...