Up Just One Creek

A rare Colorado trout may be even more elusive than previously thought, reports The New York Times' Green blog. The greenback cutthroat trout, which is the state fish of Colorado, was thought to live in five wild populations, but a recent study of current fish populations, preserved samples, and historical stocking records indicates that there is only one wild population of the trout, the Times says.

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The UK's Human Fertility and Embryology Authority calls for consumer genetic testing companies to warn customers that testing could uncover family secrets, according to the Guardian.

The New York Times reports that United Nations delegates have been discussing how to govern the genetic resources of the deep sea.

Researchers have transplanted edited cells into mice that appear to combat cocaine addiction, New Scientist reports.

In PNAS this week: analysis of proteolytic enzymes secreted by circulating tumor cells, phylogenetic study of Fv1 evolution, and more.