<span>Obtaining scientific data from a distance is called remote sensing</span>
The geologic history of the Earth is broken up into hierarchical chunks of time. From largest to smallest, this hierarchy includes eons<span>, eras, periods, epochs, and ages.
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As my memory serves me well, innovations like the production of gunpowder, tea, and silk are usually attributed to D. China
There are 8 planets in our solar system
