Important Inventions League
What do you think is the most important invention?
Click on one to cast your vote
Space travel
Modern
The first spaceflight was in 1961 when Yuri Gagarin made one orbit around the Earth aboard the Vostok 1. Space tourism is now available but very expensive.
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.
