The Buzz on Bee Barf! Sticky Science Behind Bumblebee Vomit Once upon a time, scientists believed that bees chose plants with the sweetest nectar. But new research shows that there's actually more to the story. Join Mindy and Guy Raz for an epic tale of one Gramma BEE-Force, and a bunch of barf - for SCIENCE! It's the Who, What, When, Where, Why, How, and WOW of bumblebee vomit.