+0. 1  Many times I hear terms like left-wing politician and right-wing politician. 2  left-wing = the radical, reforming, or socialist section of a political party or system. 3  The terms left and right or left-wing and right-wing are used in a ridiculous attempt to arrange every political concept along a single axis.
The history of the airplane shows it was invented by Orville (1871-1948) and Wilbur (1867-1912) Wright. They got the patent 9 months prior to their flight in December 1903. The Early History of Flight.
The cursorial (or Ground-Up) theory of the evolution of flight is the theory that birds evolved from ground-living theropods, as opposed to arboreal species. This refers to the presumed cursorial nature of theropod dinosaurs, and that the flight apparatus may have been adapted to improve hunting by lengthening leaps and improving maneuverability.