Melissa Block speaks with John Vucetich, a wildlife ecologist from Michigan Technological University who is leading the wolf-moose winter study at Isle Royale National Park. The park is located in the northwest corner of Lake Superior. The study is in its fifth decade.
Doctors are running out of effective antibiotics, as bacteria evolve ways to evade one drug after another. Now DARPA has called for alternatives to conventional antibiotics. Nanotechnologist Chad Mirkin discusses one such weapon–tiny globs of DNA and RNA that can switch off the bugs’ antibiotic resistance. Nanotechnologist Chad Mirkin discusses next-generation antibiotics that target a bacterium’s DNA.
The prospect of a giant oil pipeline running from Canada to Texas has activists up in arms. About 800 people have been arrested in ongoing protests at the White House. The Obama administration says it will decide by the end of the year whether to approve the 1,700-mile-long Keystone pipeline.