The quote "Aerodynamically, the bumble bee shouldn't be able to fly, but the bumble bee doesn't know it so it goes on flying anyway" is attributed to Mary Kay Ash ^{1 2}. The quote is often used to describe the bumblebee's flight, which was once thought to be impossible by Antoine Magnan, a French zoologist, in 1934 ³. However, bumblebees continue to fly as usual, and if they run out of energy, they cannot fly and are doomed unless they get more food ⁴.