Ancient crystals reveal that Earth began recycling its crust and forming continents billions of years earlier than scientists ...

Early Earth lacked life’s essentials until a collision with Theia added them. This chance event made life possible. After the ...

The Earth formed over 4.6 billion years ago out of a mixture of dust and gas around the young sun. It grew larger thanks to countless collisions between dust particles, asteroids, and other growing ...

Sara Novak is a science journalist and contributing writer for Discover Magazine, who covers new scientific research on the climate, mental health, and paleontology. View Full Profile. Earth formed ...