Impossibility of Flight Heavier-than-air flying machines are not possible. ~ Sir William Thompson, Lord Kelvin (1824-06-26 1907-12-17 age:83) 1895 He apparently failed to notice that birds and insects are heavier-than-air flying machines.
Heavier-than-air flying machines are not possible.
He apparently failed to notice that birds and insects are heavier-than-air flying machines.