Photo by Christine Carson
Two alpine bumblebee species, formerly picky eaters, are expanding their palates – by shortening their tongues.
As the climate warms, their homes near the peaks of the Rocky Mountains have fewer flowers than before. At Pennsylvania Mountain in Colorado, for example, the number of flowers the bees feed on has dropped by 60 per cent since the 1970s.
Anna Nowogrodzki, science writer 