Record ice core reveals Earth's ancient atmosphere

"The longest ice-core record of climate history ever obtained has hugely extended the detailed history of Earth's atmosphere, and shows that levels of greenhouse gases really do march in lockstep with changes in temperature.

The frozen record of the Earth's atmosphere is 3270 metres long and covers the last 650,000 years – 50% longer than before. It was obtained from the tiny air bubbles trapped in a deep ice core from Antarctica."
New Scientist

OK now lets wait for what Rush has to say. We all know that you can not believe any evidence till the expert Rush qualifies it.