Significance of the Paleolithic era was that it took up up the majority of our human history about 96% and although not much happened in that time, without the Paleolithic era, there would be no foundation for modern life.
Salt in the ocean comes from rocks on the land ...the rain that falls on the land contains some dissolved carbon dioxide from the surrounding air
Planes need speed to take off and cars need a little bit of speed to take off in a flash in a snap
