Earth’s outer shell ballooned during massive growth spurt 3 billion years ago

 Around 3 billion years ago, Earth‘s crust ballooned during a massive growth spurt, geoscientists have found. At that time, just 1.5 billion years after Earth formed, the mantle — the layer of silicate rock between the crust and the outer core that was more active in the past — heated up, causing magma from that […]