Authors:

I feel we're on pretty solid ground in interpreting orbit around the sun as the primary driving force behind ice-age glaciation. The relationship is just too clear and consistent to allow reasonable doubt.

"Despite Global Warming, Scientists Say to Expect Another Ice Age—In 5,000 Years". George Kukla's remarks at the international symposium convened by the Lamont-Doherty Earth Observatory, www.columbia.edu. February 25, 2000.
I feel we're on pretty solid ground in interpreting orbit around the sun as the primary driving force behind ice-age glaciation. The relationship is just too clear and consistent to allow reasonable doubt.