We know that Earth is about 4.54 billion years old, but trying to piece together the very earliest stages of its evolution is ...

Just how long has the universe been around? Scientists estimate the universe is 13.8 billion years old, with an uncertainty ...

A new study has identified an exoplanet that is just 3 million years old — around 1,500 times younger than Earth — alongside a misaligned protoplanetary disk that researchers cannot explain.

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 ...

Nearby exoplanet has grown a tail 44 times longer than Earth — and it's acting like a giant 'stellar windsock' —'Baby' exoplanet, equivalent to 2-week-old infant, is the youngest alien world ...