External and internal forcings: External forcing mechanisms involve agents acting from outside the climate system (e.g., Milankovitch cycles). Internal mechanisms operate within the climate system ...

Changes in Earth's orbit have helped pace climatic change for millennia. Scientists are now trying to understand whether - and how - these changes remodeled the landscapes our ancient ancestors ...

Those natural cycles are caused by changes in three properties of Earth and its orbit around the sun. Together, they are referred to as Milankovitch cycles, after the early 20th century Serbian ...

The Milankovitch cycles are not a new theory, but still bear discussing. As both the article and Virusrex have said, much more influential that the Earth's orbital cycles are the effects of humanity ...