Noting that after military battles the weather frequently turns rainy, early scientists tried to recreate the effect. The cause of the rain after a battle is that droplets form around the smoke and dust particles in the air. But the early rain makers thought it was because the sky was shocked by the explosions. So they tried to make it rain by shooting cannons into the air or carrying explosives aloft in balloons. Their attempts were horrendously noisy, but mostly unsuccessful.