The drug push

This past Jan­uary, micro­bi­ol­o­gists Kim Lewis and Slava Epstein reported the dis­covery of teixobactin, a com­pound that in lab dishes kills sev­eral antibiotic-​​​​resistant strains of bac­teria. Media out­lets her­alded the […]

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Are Species Special?

With the 12 June 2012 death of Lone­some George, the last known full-​​​​blooded Pinta Island tor­toise (Che­lonoidis nigra abing­donii), his sub­species appar­ently became extinct. [How­ever, there is DNA evi­dence from […]

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