- 3,001
PublicSecrecySome guy posted some crazy **** in the convo forum (no offense to whoever it is) about how there was probably a civilization on the Earth before us. Um, yes the Universe is 14-15 billion years old, and yes earth is 4-5 billion years old...but how could we have gone through so many generations of exploring and only come up with neanderthals and primates and dinosaurs? It's almost innevitable that we'd eventually find some peice of a lost billion year old civilization. and lets not forget that the earliest forms of life discovered originated between 1-2 billion years ago. Don't you just love shell fish?
[Edit] Oh and don't forget that since we're 1 astronomical unit away form the sun now, 5 billion years ago, we'd be about 1/2 as far away, and the sun would have been bigger, and the Earth would have still been forming. So because there was nothing to stand on (ala hot molten magma everywhere) and many of the gasses that were on Earth were barely breathable, it is extremely unlikely any form of life would have formed.
I am not ver smart about this stuff, but 5 billion years ago wouldn't the sun have been half as big. I thought as a star, like the sun, cooled down it grew in size and eventually it will grow so big it will engulf, or "suck in," the earth.