Ancient DNA pulls back curtain on the Sahara Desert’s greener past
This week, discover the Sahara’s greener past, explore a mysterious cosmological force, marvel at a new concept for space ...
Earth’s First Crust Was Continental – Long Before Plate Tectonics Began
New research suggests that Earth's first crust, formed over 4.5 billion years ago, already carried the chemical traits we associate with modern continents. This means the telltale fingerprints of ...