Red Fish, Blue Fish, One Fish Becomes Two Fish

sea-maid submitted, created time 3 months 6 days (sciencenow.sciencemag.org)

Changes in vision lead to new species in cichlids in a form of sexual selection not usually seen (or at least not usually recognized).

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Evolution and historical continguency caught on tape! E. coli amass traits over time.

Darkfrog submitted, created time 6 months 3 weeks (www.pnas.org)

Historical contingency is a new phrase for me. I gather that it means "the idea that a given new mutation cannot create a new trait unless certain other, related mutations have already taken place." Anyway, it's been observed, repeatedly, in a laboratory setting.

Researchers split some identical E. coli into twelve colonies and gave them a glucose-poor medium that contained citrate, which E. coli cannot ordinarily process. Eventaully, around generation 32,000 some of the E. coli gained the ability to use citrate as food

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Why Aren’t All People Beautiful?

Sue Wu submitted, created time 1 year 3 weeks (discovermagazine.com)

Natural selection, we’re told, is the process by which nature promotes our best qualities. But a look around strains that notion. If nature selects health, beauty, and intelligence, why are most of us far from flawless?

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Evidence that up to 10 percent of human genome may have changed very recently revealed by CU researchers

bianjie submitted, created time 1 year 5 months (www.news.cornell.edu)

A Cornell University study of genome sequences in African-Americans, European-Americans and Chinese suggests that natural selection has caused as much as 10 percent of the human genome to change in some populations in the last 15,000 to 100,000 years, when people began migrating from Africa.

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Marsupial DNA Offers Insight Into Efficiency Of Natural Selection

dovechocolate submitted, created time 1 year 7 months (www.medicalnewstoday.com)

Study of the DNA of a South American marsupial called the opossum has revealed that a gene's location influences whether or not it is likely to gather changes that could lead to disease. The researchers focused on gene location within DNA when it is packaged into chromosomes, the protective carrier for DNA.

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