Orbit - Round and Round in a Not So Circular Fashion

I came across this article released in April that details a new proposal for the origin of the PETM. It has long been known that the Earth's orbit is not circular, but varies over time, creating an Orbital Forcing effect on Earth's climate system. This article puts forward the idea that the Earth's orbit may have been both highly eccentric and oblique at the start of the PETM, affecting permafrost in the Arctic and the Antarctic and caused a large release of carbon dioxide and methane!