For a quarter of a century, Panamanian golden frogs were not seen in the wild. These brightly colored little amphibians had ...

Add Yahoo as a preferred source to see more of our stories on Google. A joint report alleging that a poison dart frog toxin has been linked to the death of Russian opposition leader Alexei Navalny ...

Prominent European countries have alleged that Russian opposition leader Alexei Navalny was poisoned with a lethal toxin derived from poison dart frogs, and accused Moscow of responsibility for his ...

A joint report alleging that a poison dart frog toxin has been linked to the death of Russian opposition leader Alexei Navalny rippled quickly around the globe among scientists. The allegations raised ...

This article is part of an occasional series in which Nature profiles scientists with unusual career histories or outside interests. On warm, muggy evenings, conservation biologist Anthony Waddle and ...

Russian opposition leader Alexei Navalny speaks to the media in front of security officers standing guard at the Foundation for Fighting Corruption office in Moscow, Russia, Thursday, Dec. 26, 2019.