Earth's thick continental crust - the land under our feet - may have risen from the oceans half a billion years earlier than scientists previously thought.
A new study suggests that mammal 'experimentation' with different body-plans and tooth types peaked in the mid-Jurassic period, 200-145 million years ago
Moon might harbor bits blasted off Earth billions of years ago. These lunar time capsules could hold secrets of what Earth was like as life first emerged.
People around the world rely on groundwater for drinking and crop irrigation. But a new satellite data study says that many of our biggest aquifers are overstressed.