These huge impacts created enough heat to vaporize metal, such as iron, gold, and platinum, which would have ascended into the atmosphere as a kind of metal vapor. And since what goes up has to come down, the early Earth would have experienced metal rain.
Golden showers for everyone!
Still, early life shrugged off this calamity as just another every day thing. You wake up, you eat breakfast, you lounge about for a while, you bunker down for a global extinction-level event, you have dinner, you go to bed. It kind of puts human problems in a whole new perspective.
Life May Have Originated On Mars
You might wonder, "Why are scientists spending so much money looking for life on Mars, when they could have given us sex robots, hoverboards, or sex robots on hoverboards by now?" One of the reasons is that, from all we know about life, it seems much more likely that it originated on Mars than here.
Ergo, Martians may already have hover-sexbots in their underground cave-cites.
Billions of years ago, the environment on Mars was actually more hospitable than Earth. Life required a large amount of oxygen to form, but oxygen was relatively scarce here. It was plentiful on Mars. On top of that, life required the elements molybdenum and boron, of which there was also a whole heap on Mars, but not so much on Earth.
Personally, we eat two scoops every morning.
So, some scientists think that life first spawned on Mars, in a distant age before it became such an inhospitable wasteland, and came to Earth when some really hardy microorganisms hitchhiked on meteors that broke off the Martian surface.
Technically, we might all be invaders from Mars.
Micah Kolding can be found on an Internet-based site known as "Twitter," where he is known as @MicahKolding.
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Also be sure to check out 5 Insane Theories About Why We Haven't Discovered Alien Life and 5 UFO Sightings That Even Non-Crazy People Find Creepy.