Why is the disappearance of the “Neanderthal” Man 30,000 years ago, significant today? (Part D)
As we have mentioned in Part C of our article ,there have been 4 “major ice ages” in the past, and the Earth is currently experiencing the fourth “major ice age” which began 2.5 million years ago.We also mentioned that within each “major ice age”,there are climatic cycles which last approximately 100,000 years.We have the cycle of glacial advance called “glacial period”,when the Earth,s atmospheric temperature decreases causing glacial advance from the Poles towards the Equator, lasting approximately 60,000 years; then there is a warming cycle called “interglacial period”,when the Earth΄s atmospheric temperature increases and a glacial retreat occurs towards the Poles,lasting approximately 40,000 years.