X-rays were discovered. They've always been around. But since their discovery, we've invented ways to create and then apply them to do stuff.
No, they did not.
WW2 was not "discovered " it was a war that the world was involved in on two fronts.
typhoid was discovered in World war 1
The Polanders
world war 1
it was 14.123.000 before and 1 after the war
There were cars well before World War 2. Before World War 1 even.
It was discovered in 1778. It was discovered by a scientist named Scheele. It was then used in World War 2 as a component to steel.
World War 1
World War 1 was not discovered. We know about it because it was a huge moment in history that didn't happen very long ago and we still remember it. Some people that were in World War 1 are even still alive now!
Before world war 2, Spain was involved in a civil war.
no it was only discovered in world war 2