Earth’s early magma oceans detected in 3.7 billion year-old Greenland rocks
Earth’s early magma oceans detected in 3.7 billion year-old Greenland rocks: 4 billion years ago, the Earth was composed of a series of magma oceans hundreds of kilometres deep. Larich/Shutterstock Earth hasn’t always been a blue and green oasis of life in an otherwise inhospitable solar system. During our planet’s first 50 million years, around …