Question: has the temperture changed since the preasoric times?

Gill Menzies answered on 18 Mar 2012:

There are scientific reports which demonstrate that temperatures were 2-3°C warmer in prehistoric times than they are today. This difference can have huge effects on the earth and its weather systems – there is even evidence that the world’s biggest desert was once a lush savannah area – methods to date fossils and rocks shows us these changes “recorded” in stones and minerals.