Has there been AN Ice Age?
following chapters, we are going to study the Ice Age; it is not a very old
concept. It was not thought of in the 1700s, just like the theory of evolution
was not widely known then either. This theory only gained ground in the 1840s
when two researchers, Charpentier and Agassiz, tried to explain the forms of
the Alps by the theory and later expanded it to apply to
the whole of Northern Europe. It is surprising that this
theory came to light almost at the same time as Darwin's
idea of the origin of species. Both of these theories gained simultaneous
attention in the society of that time.
It has been thought that there
have been several Ice Ages on the Earth. It has even been said that tropical and
hot areas like the Sahara, Africa, Saudi Arabia, Yemen, Australia, India,
Madagascar, and South America (as presented in the books Jääkausi
(Ice Age) / Björn Kurten and Muuttuva maa / Pentti Eskola, for example)
were covered with a large continental glacier tens of millions of years ago.
The latest Ice Age is assumed to have started "just" about 500,000
years ago and ended 10,000 years ago. The ice sheets are believed to have
covered at their widest 55 million square meters, and the thickness of the ice
was at most over 3 kilometers (about 1.8 miles).
What should we think about the Ice Age? Have we any reason to believe in
it? Maybe the signs that have been interpreted as signs of an Ice Age were
caused by something else? We will now study the mystery of the Ice Age.
Chapter 1 - What causes Ice
2 - Climate