“ Greenhouse gases CO2 was hardly the only greenhouse gas present in Earth's early atmosphere, and gram-for-gram isn't even the most effective. ... (read full comment) ” 

Posted on June 2, 2011 at 2:04 AM EDT

“ An unexpressed corollary to Clarke's 3rd Law is that when a distinguished but *youthful* scientist agrees with that elderly scientist that... (read full comment) ” 

Posted on April 3, 2009 at 5:01 PM EDT

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