Continents Buried Deep Down Earth's Crust Are As Old As Our Planet Some of the igneous rocks the researchers sampled had more helium-3, which means they may have come from primitive rocks in the mantle. Scientists say the buried continents are as old as the Earth itself. by Allan Adamson
Science Molten Rock Turns Into Granite At Temperatures Much Lower Than Previously Thought by Nicole Arce
Science Ancient Igneous Rocks Reveal Earth's Inner Core Is About 1.5 Billion Years Old by Katherine Derla