2007-04-11 08:13:07 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
They may have brought material essential to kick start the evolutionary process into action.
2007-04-11 08:17:17 · answer #1 · answered by Trevor h 6 · 2⤊ 0⤋
Maybe the water and/ or some organic complex molecules comes from the comets that had felt to the Earth.
Maybe the first living cell come from the comets.
2007-04-12 03:28:50 · answer #2 · answered by Anonymous · 0⤊ 0⤋
There's a theory (unsubstantiated) that the water on Earth was brought over millions of years by comets smashing down. And, Comets consist of a large amount of water.
There's another train of thought that life didn't actually originate on Earth, but was brought by microbes that may have been attached to comets.
2007-04-11 15:19:06 · answer #3 · answered by quantumclaustrophobe 7 · 0⤊ 2⤋
One theory is that life on earth was seeded - brought here on a comet from another part of the universe. I find that quite an exciting idea, and it makes sense to me.
2007-04-12 02:00:48 · answer #4 · answered by Hello Dave 6 · 0⤊ 0⤋
Comets contain the heavy metal elements necessary for life to develop, theoretically. These elements arent found naturally on earth. They originate in outer space.
2007-04-11 15:17:39 · answer #5 · answered by jeanimus 7 · 1⤊ 1⤋
They are believed by some scientists to have brought the 'building blocks' of life, i.e. amino acids (Which make up protiens) to Earth, where there were the right conditions for them to begin to evolve. THis website's quite good for explaining different ideas about how life came to Earth : http://leiwenwu.tripod.com/
2007-04-12 02:42:57 · answer #6 · answered by Kit Fang 7 · 0⤊ 0⤋
trevor h and jeanimus are right
2007-04-13 08:46:07 · answer #7 · answered by zzz 1 · 0⤊ 0⤋
i agree with trevor
2007-04-11 15:19:02 · answer #8 · answered by Anonymous · 0⤊ 0⤋
the big bang
2007-04-11 15:21:59 · answer #9 · answered by Ravi Joshi 3 · 0⤊ 2⤋