Question: What year was the black hole found?

How many rocks from space have you collected

I would love to know, if this world were to revert back 100,000 years. What would you study or do first?

why when a star explodes it leaves gravity then it turns into a blackhole why does it leave gravity?

if we move to mars dosent that me we are back to square 1 becuase there wont be any cars or houses

what can black holes not swallow