[PatrickHenry]

PING. [This ping list is for the evolution side of evolution threads, and sometimes for other science topics. FReepmail me to be added or dropped.]

[Alamo-Girl]

Thanks for the heads up!

[edwin hubble]

"Dr von Blow says that after the Cambrian Explosion there has been a stabilisation of temperature up to the present, and that the biosphere is not playing a passive role.

He also adds that there is an intriguing implication from his research which suggests that had the conditions been only slightly different, the Cambrian Explosion could have occurred two billion years earlier. "

This is a very big thought indeed.

Our Earth now has only a billion years or so of comfortably habitable conditions. Just imagine if we had had 2 billion more years of complex life in the natural history of Earth.

Another item raised: The reference to the 'self-regulating' properties of Earth and its climate...staying between the cold and warm states for the last billion years or so.
(...but nonetheless fluctuating in that range without human activity).

[RadioAstronomer]

bttt for later read this evening. :-)