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4 comments

1 Gretchen G.Tiger  Sat, Sep 17, 2011 8:12:23am

This sounds really, really interesting, but my eyes glazed over by the beginning of the 2nd Paragraph.

Is there a version for "Dummies"?

2 Picu  Sat, Sep 17, 2011 8:28:56am

Who pulls away the Moon? Moon was in, Moon goes out, you can't explain that

3 Gretchen G.Tiger  Sat, Sep 17, 2011 8:34:11am

nnnnoooot . gooing . there!

I'm so proud of myself.

4 Achilles Tang  Sat, Sep 17, 2011 10:22:00am

One key item about the moon missing in that piece is the effect it has on stabilizing the earth's spin axis, which I find more interesting. Without the moon the earth's axis would
precess by a very large number (I forget exactly, but perhaps 40 degrees), like Mars does. This means highly variable climate changes within evolutionary time frames, as well as polar magnetic orientations towards the sun at times, with corresponding high radiation at the surface there.

In short, while it doesn't preclude life, evolution would have taken a dramatically different track and it is possible that the regular climate disruptions could have prevented large animal life from having sufficient environmental stability to evolve at all.


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