[CalConservative]

Aside from the radioisotope dating issues in zircons, a cool earth with surface water present shortly after its formation certainly presents some challenges to standard scenarios concerning the development of the earth and the formation of life.

[MissAmericanPie]

According to Genesis, from the time of Adam to the time of Noah, it had never rained on the earth. Plants were watered from a mist that rose from the ground. Most likely it would be wise for Scientists to start from that assumption.

[coloradan]

How are the theories regarding the formation of life challenged by pushing back the time of liquid water? Life is believed to have evolved in liquid water anyway. Whether the Earth was covered in water or steam before this time makes no difference from an evolutionary standpoint.

[LiteKeeper]

read later

[Citizen Tom Paine]

Its been a long time since I had geochemistry, but I thought there was quite a bit of evidence that the Earth formed from cold concretion. That is, cold pieces of material in orbit around the sun were drawn together by gravity. The Earth later may have heated up from radioactive decay of short lived radioactive elements.

[blam]

"Aside from the radioisotope dating issues in zircons, a cool earth with surface water present shortly after its formation certainly presents some challenges to standard scenarios concerning the development of the earth and the formation of life."

Yup. Expect in the next few years to read that life on earth is older than ever believed. Good article, thanks.

[Khurkris]

So...this moves the origin dates for beer even FARTHER back. I suspected as much.

[RadioAstronomer]

Ping! Though you would find this interesting.

[aruanan]

Valley and his colleagues agree. “The cool early Earth hypothesis is controversial, and we are working very hard to test it,” Valley says.

A cool early Earth would be consistent with the vast amounts of abiogenic methane that are constantly percolating up from the upper mantle.

[SunkenCiv]

Diamonds Tell Story Of Earth’s Beginning
The Telegraph (UK) | 8-22-2007 | Roger Highfield
Posted on 08/22/2007 9:48:58 PM EDT by blam
http://www.freerepublic.com/focus/f-news/1885157/posts

[SunkenCiv]

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