What is erosion? Geology
Erosion of a cliff in Canada Igneous rocks came first When the Earth first formed, about four and a half billion years ago, it was all liquid rock and liquid [...]
Erosion of a cliff in Canada Igneous rocks came first When the Earth first formed, about four and a half billion years ago, it was all liquid rock and liquid [...]
Climate change and world history: Wildebeest on savannah grasslands, Kenya (Africa) African grasslands emerge In the years just before human beings first evolved, the world was a wetter place than [...]
Himalaya Mountains: part of the Chinese environment China's like a staircase Sometimes people describe China's landscape as being like a staircase with three steps. The top step of this Chinese [...]