Plio-Pleistocene African climate. Science 270, 53-59 (1995). deMenocal, P. B. African climate change and faunal evolution during the Pliocene-Pleistocene. Earth and Planetary Science Letters 220 ...
Those orbital shape changes could potentially cause Earth's climate to change over the long term ... whereas the farthest point (aphelion) is about 152 million kilometers (94 million miles).