Why bumble bee cannot fly aerodynamically? I just saw this pic 

So I got curious and logged in on physics.stack first time, is it true? I am a math major and usually wander on mathstack but I would like to understand why Bumble bee cannot fly according to physics laws but still do? I am only familiar with high school physics, no aerodynamics at all. If some one can explain it to me in easy terms, I'll be obliged. 
 A: This is not true. The rumor comes from a paper written in the 30s. The scientist, Antoine Magnan, who made the paper did his calculations wrong and retracted the paper, but, of course, the media wouldn't listen.
A: If bumblebees were propelled the way fixed-wing aircraft are propelled, their wings would not be aerodynamic.  An airplane needs two devices to become and remain airborne.  Its engines generate thrust, and its wings provide lift.
A bumblebee, however combines both thrust and lift into one integrated device.  The bumblebee's wings, unlike a fixed wing aircraft, and unlike even a helicopter's blades, operate independently of each other.  They oscillate, rather than rotate, and create a powerful vortex above them that generates considerably more lift than a fixed-wing aircraft, and their independent wings create more maneuverability than a helicopter's fixed blades.
An Oxford University team put bumblebees in a wind tunnel and studied the effect produced by the bumblebee's wings: http://www.sciencedaily.com/releases/2009/05/090507194511.htm.  Here is an abstract of the actual study: http://link.springer.com/article/10.1007%2Fs00348-009-0631-8.
Although a bumblebee is an inefficient flyer, it's large thorax and nectar-fueled energy consumption overcome the small size of its wings.
