Which Renaissance invention do many historians consider to be the most important invention of the last thousand years ? A.) Wheel

B.) Combustion engine

C.) Airplane

D.) Printing press

What principle did president truman invoke in sending u.s. troops into south korea without first asking congress to declare war?

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.

Anoxia, or a lack of oxygen in bodies of water, leads to a. unsafe drinking water b. dead zones c. global warming d. algae blooms select the best answer from the choices provided. a b c d