Dagens Bild - 24 januari 2013
Bildkälla:
http://www.awi.de/en/research/research_divisions/geosciences/marine_geology_and_paleontology
For about 2.5 million years ago, the Earth entered a new phase. The
climate began to swing more. It swung between ice ages and warm periods
and then the oscillations became larger the period called was called
Pleistocene. If we look at the last one million years, the Earth is in a
cold period. |