Post #4274262

1/2 “A Sting in the Tale” by Dave Goulson In flight a bumblebee flaps its wings 200 times per second (which equals 12,000 rpm), roughly equivalent to the speed of a high-revving motorbike engine. This generates a lot of heat, but of course comes at a cost: bumblebee flight is enormously expensive in terms of the energy that it uses. A running man uses up the calories in a Mars bar in about one hour. A man-sized bumblebee would exhaust the same calories in less than thirty seconds.