TeaEarlGreyHot wrote:
John_Browning wrote:
They need to verify that the meteorite in question wasn't part of the earth at one time and got blasted into space by a large asteroid. If some of the microbes in the rock look similar to microbes on earth, then perhaps they need to consider that the microbes are from earth and that the stranger looking ones went extinct long ago and we haven't found any other fossils of them. This Hoover guy failed to apply Occam's Razor before shooting his mouth off to the press.
Personally, I'd like to find out there is live out there, but the evidence hasn't solidified yet.
With the vastness of space, what are the odds that a piece of the prehistoric earth has come full circle and landed before our sun went supernova?
The odds are good.
First- rocks from the moon and mars are found on earth. If moon and mars rocks land on earth why wouldnt an earth rock also fall back to earth? A coin doesnt know to come up heads because last time it came up tails. An asteroid doesnt know to avoid the planet it came from. What planet it hits is random. So its own birthplace is as likely a target as any.
Second if you're a rock ejected from the earth into space what would your fate most likely be?
You cant just wander randomly in space, nor make a beeline toward interstellar space.
Like a pinball in an arcade machine your path would be dictated by gravity. Your path is going to be dictated by the gravitational fields of nearby celestial bodies. Youll end up in orbit around something big nearby-or you're gonna slam right into it.
The nearest big thing to you is going to be the Earth. So falling back to earth (later if not sooner) is your most likely fate.
08 Mar 2011, 3:34 pm
