It was raining on Earth.
. . . the whole Earth.
Well, except the poles–there, the rain was a furious blizzard. It was also raining underwater. Such fury had been excited in the impact that great cannonballs were pounding the shallows into a seething, bubbling confusion of water and air.
Humanity had seen the asteroid coming. It was 31 years out when we first spotted it, but it was also big. NASA took one look and shrugged. The other national space agencies did the same. There was just nothing to be done. We didn’t have the infrastructure. Didn’t have the experience. The tremendous rockets of the space launch system were finally putting our men and women on Mars. But it couldn’t budge that rock from its fateful course. Literally couldn’t, correct to the first five decimal places.
The politicians all begged and promised money. Especially in the United States. But it just couldn’t be done. It was already too late. We could only evacuate the East Coast, strengthen the colonies on other planets to hedge our bets, and hope for the best.
On that morning of 2060, a mountain-sized interplanetary bullet on a chance encounter kerplunked into the Atlantic Ocean, and Earth shivered in the torrent of its own frozen waters, churned up from the depths. Debris fell on the other side of the planet; the sky was darkened for a year; the loss of life was catastrophic. And so the people declared that whatever it took, whatever expense had to be paid, whatever technologies had to be developed, this would never be allowed to happen again.
. . . and that’s how we finally reached for the stars . . .