How did life begin on Earth? While scientists have theories, they don't yet fully understand the precise chemical steps that ...

Iron sulfides, common in ancient hydrothermal vents, may have played a crucial role in creating life on Earth. These minerals could have helped form the basic molecules needed for life, new research ...

The history of life on Earth began long after the planet's formation 4.6 billion years ago. During the earliest stage of ...

Earth should have lost its water long before life ever had a chance to appear. Bathed in a young Sun’s fierce radiation and wrapped in a global magma ocean, the planet’s surface looked more like a ...

It isn’t easy to figure out how the Earth was built, because it happened 4½ billion years ago, and no one was there to watch. So scientists have had to look at what the Earth looks like now and at all ...

Today is the 55th Earth Day celebrated in the United States.It’s held every year on April 22 — a date originally chosen to fit college students’ schedules. But many may not know how Earth Day began or ...