<span>Taking the age of the earth to be about 4 * 10^9 years and assuming the radius of its orbit has not changed and is circular, calculate the approximate total distance the earth has traveled since its birth (in a frame of reference stationary with respect to the sun)</span>
According to Geology, there's a theory which held that surface, mountains, lakes, were created by suddenly because of great catastrophes like earthquakes and floods.
Savannas have an extensive dry season and consequent fires. As a result, there are relatively few trees scattered in the grasses and forbs (herbaceous flowering plants) that dominate the savanna