Hummingbirds speed up pineapple family's evolution

Hummingbirds make bromeliad plants split into new species twice as fast as other pollinators do, scientists at the University of Reading have found. The research team gathered records of which animals pollinate 403 types of bromeliad, which include pineapples and more than 3,700 species, and found three in four of these plants are visited by hummingbirds.