But the cost of ink and the cost of producing a rocket is almost the same!

Im curious as well. It wouldve been millions, or billions, or trillions of asteroids large enough to not break up, but large enough to "survive" an impact with Earth for long enough to not get instantly evaporated by proto-Earth lavas and what not.

Its not exactly like theyre balloons filled up with water being thrown at Earth, theyre mostly just rock, minerals and metals.

Unless we got lucky and got a bunch of massive ice-asteroids.

What I dont get is how many (or big) asteroids would've had to cross its path with Earth, enough to create all the water that eventually enabled life to exist. Theyre not exactly water balloons filled to the brim with water.

How much water is in an asteroid, and how many did make it through the atmosphere? Earth must've been bombarded every second for however many years, and likely other planets like Mars as well.

Except Mars had a different fate than ours unfortunately.

Well, as much as going light-speed would revolutionize space travel, its not "fast enough".

For reference, the closest galaxy is 25,000 light years away, which would take 25,000 years to go to (or come to us) at the speed of light. Assuming of course theres no one except us in the Milky Way, and that there is someone in that galaxy. If someone is even "only" 1 light year away, it would take 1 year to send/recieve a message. Unless they send a spaceship to directly communicate with us that is.