Important Inventions League
What do you think is the most important invention?
Click on one to cast your vote
Soap
Ancient
Soap is made from oils or fats that react when mixed and heated with ash. It is used with water for washing. Soap used by the Babylonians in 2800BC has been found.
Air conditioning
Modern
Adjusts air temperature and humidity to make buildings and vehicles more comfortable. Modern electrical air conditioning was invented by Willis Haviland Carrier in 1902.
