"Critics who dismiss the importance of greenhouse gases as a cause of climate change
lost one piece of ammunition this week. In a new study, scientists found further evidence
of the role that greenhouse gases have played in Earth?s climate. In Thursday?s issue of
the journal Geology, Ohio State University scientists report that a long-ago ice age occurred
10 million years earlier than once thought. The new date clears up an inconsistency that has
dogged climate change research for years."

So now they they say they were dogged by an inconsistency?
Thought they were saying it was a slam dunk:)

What happens if this finding proves to be wrong. I mean from what it says in the article, it doesn't seem very conclusive. For example:
"Next, the scientists examined limestone sediments from the sites and determined that there was a relatively large amount of organic carbon buried in the oceans -- and, by extension, relatively little CO2 in the atmosphere -- at the same time. "

This does not seem like a strong evidence to me- it seems it could just as easily prove the opposite. Anyways, if the finding later prove to be false, can we then toss out the idea that GW caused by humans? Or do we return to previous state of things-not questioning that Human activity is responsible for globe warming?

Btw:
"With CO2 levels as much as 20 times higher than today, the late Ordovician period (460-440 million years ago) wasn’t a good time for growing ice. "

As much as 20 times higher? Why that would almost be about 1% of the atmosphere being CO2. That's got to somewhere around the amount of Argon in the atmosphere, no?