Aerodynamically a bumblebee can fly. How do we know this? Because it flies. If someone says it can't because aerodynamic rules say it can't then, obviously, not enough rules are known to know or understand what can cause flight.
Heavier-than-air flying machines are impossible.
[Lord Kelvin, 1895]
Radio has no future. Heavier-than-air flying machines are impossible. X-rays will prove to be a hoax.
William Thomson, Lord Kelvin English scientist, 1899
There will never be a bigger plane built.
Boeing engineer, after the first flight of the 247, a twin engine plane that carried ten people.
The bomb will never go off. I speak as an expert in explosives.
Admiral William Leahy, U.S. Atomic Bomb Project.
By the way, that Lord Kelvin was a mathematician and physicist. He was one of the leading physical scientists of his time. He developed the idea of absolute temperature (Kelvin). He was responsible for the Second Law of Thermodynamics.
Now what brilliant scientist says aerodynamically a bumblebee can't fly?
Science has a lot more to learn.