evidence: Altering over many thousands of years, these shifting temperatures have been determined by variations in Earth's orbit around the sun. While greater distances have resulted in colder cycles, shifts closer to the ball of heat have led to warmer, interglacial periods. [...] A widely discussed analysis of the evolution of the scientific consensus on anthropogenic global warming was published in 2013. [...] Human-caused climate change is endorsed by the IPCC. As far back as 1995, the intergovernmental body said"the balance of evidence suggests a discernible human influence on global climate."