I was thinking about a lot of the doomsday stories about how there was life on earth and then a big meteor hit Mexico and wiped everything out and all life on earth basically died and had to start over again.

And it occurred to me that perhaps Mars and Venus for example are going through their period of being hit by a meteor and everything wiped out.

What if people on those planets became highly successful and knew that a meteor was coming and so popped over to earth and tried to preserve life by sending down DNA or what was needed to coaxe life into existence here.

Its interesting to think about both Mars and Venus having life on it that got wiped out.

I'm tired and its raining and I'm blaaah so I'm probably making this too sloppy but any thoughts on this?

if that were the case, too bad only the dna survived..some technology from the extinct rase would have at least spared us the Dark Ages, right?

but that aside, if they had been so advanced as to put the dna of so many forms of life here...why not just colonize the earth? what a great "ark" story that would make...

The Earth is 4.5 billion years old, the whole of the solar system is around the same age. The first life appeared on Earth around 3 billion years ago; so you're proposing that life first appeared on Mars/Venus and evolved in to an intelligent species in the 1.5 billion years before life began on Earth; then decided to seed our planet with only the bare essential ingredients of life?

Well put it this way. If a nuclear bomb went off tomorrow and people managed to survive, even though they had the ability to do all sorts of things before they'd be hard pressed to come to that level again.




The preservation of life is not necessarily the preservation of the sophistication of that life?

You could release or plant for example single celled organisms and watch them evolve into something different could you not?

Anyway I'm not so hung up on the idea that life on earth came from elsewhere but rather the interesting idea that there was life on Mars or Venus and they had some sort of extinction level event that wiped life off the planet. Like imagine finding fossils on Mars or something.

I get what you're saying. My point is just that if there was some massive disaster on another planet which resulted in them sending life to Earth, that event must have done that ~3 billion years ago (when life first appeared here).

If that's the case then the aliens could have only been alive for 1.5 billion years (time between solar system's creation and this extinction event), and it's unlikely they'd evolve to reach a state of intelligence in that time.



I love the idea that the other planets used to host life. There's no real reason why they couldn't have.

yeah, I agree, there wouldn't have been enough time for the development of complex life and civilization... IMO

I like that. Maybe. Maybe not. But probably. :/ Who knows.

Ok. That made no sense at all. Please forgive me.

Evolving once in the first place is enough.

Uhhh....

What does your theory have to do with global warming?

I'd be inclined to agree, but on the other hand we are the only example we have.

Maybe we, and life in general on Earth, developed more slowly than these hypothetical civilizations would have. Although really, I don't see how life could exist on Venus.

there is no evidence life evolved anywhere else, so the only example that has ANY credibility IS Earth... eventually people will get to Mars, then we will know whether life evolved there and when, and if it's related... till then this is all speculation... IMO