Global warming may already be a killer

Earth’s rising temperatures may be a precipitating factor in the extinctions of dozens of tropical frog species, according to new research.

CROAKING? This harlequin frog belongs to a group of species that is rapidly going extinct in Central and South America. F. Brem

At least 110 species of harlequin frogs once lived in Central and South America, but two-thirds of them went extinct in the past 2 decades.