It has been known for more than 2000 years that the earth is round, but we were able to actually see this much later only when we flew into space. The knowledge why we do not fall off from the Earth is much more recent. Today, we know that the Earth is also surrounded by an air cover called atmosphere.
Did you know that...
-more than 2200 years ago, the Greek discovered that the earth is round? They even calculated an almost accurate circumference of the Earth!!
-the earth is not a perfect globe? The circumference at the equator is 40,077 km, whereas measured over the poles it is 68 km less.
-atmosphere' is a Greek word which means 'ball of vapour'?
Did you know that...
-more than 2200 years ago, the Greek discovered that the earth is round? They even calculated an almost accurate circumference of the Earth!!-the earth is not a perfect globe? The circumference at the equator is 40,077 km, whereas measured over the poles it is 68 km less.
-atmosphere' is a Greek word which means 'ball of vapour'?
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