Science Now: As the climate changes, plants and animals are on the move. So far, many are redistributing in a similar pattern: As habitat that was once too cold warms up, species are expanding their ranges toward the poles, whereas boundaries closer to the equator have remained more static.
Bumblebees, however, appear to be a disturbing exception, according to a study in Science today. A comprehensive look at dozens of species, it finds that many North American and European bumblebees are failing to track...