A natural impulse or tendency to do something.
The development, production, and operation of aircrafts.
A prolonged public dispute or debate concerning a matter of opinion.
A person who has skills to move on water , air, or land in a ship or aircraft.
Having a powerful and irresistible effect: requiring attention.
A horizontal direction express in degrees east or west of a true or magneticnorth or south direction.
Tested propositions used as an explanation and prediction for a class of phenomena.
A synonym for freedom or being released.