How did both world war 1 and world war 2 change the world?

Basically It caused alot of new weapon/tec to be created

One famously known : The Atomic Bomb that hit japan hard

Aircrafts were made

U boats

Improved Radars

To be honest i would go and look for them but this is what came on top of my head

Also Japan was changed after the war

Russia went through some tough times with the soviet union

The America Felt a nice Push in the economy

.

the use of email to replace slower surface mail.

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.