Could the oldest rocks under our feet be the remains of a planet that is now extinct? This is the kind of question that geochemists love. And it seems that the pieces may have fallen together for the ...

Radioactive potassium, common enough on Earth to make potassium-rich bananas one of the “hottest” foods around, appears also to be a substantial source of heat in the Earth’s core, according to recent ...

Scientists have long been probing the universe to determine how elements came together to form planets and (at least in Earth’s case) gave rise to life. One disconnect was that the universe contained ...