For context, Earth itself is 4.54 billion years old, so this discovery is almost as old as its existence - although it's still not the oldest object ever found (that award goes to some ...

So how old is our planet, and how do we even know its age? Earth formed about 4.54 billion years ago, about 10 million years after the solar system was born. After a gigantic cloud of gas ...

The clock would tell him how long that ore -- and by extension, the earth's crust -- had existed. His observations and calculations put Earth's age at 2.2 billion years. This was a dramatic ...

Here’s how it works. Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds. Known as large low-seismic-velocity provinces (LLSVPs), these ...