Summary The Earth started as a ball of molten rock and has been cooling ever since. Although the crust has cooled enough for us to live on it, the mantle and core are still very hot. Ra...
Summary The Earth started as a ball of molten rock and has been cooling ever since. Although the crust has cooled enough for us to live on it, the mantle and core are still very hot. Ra...
GEOL 109 | The Earth and Life Through Time • blame cogdog • SPLOTbox theme is based on Garfunkel by Anders Norén.