Earth formed about 4.6 billion years ago, during the geological eon known as the Hadean. The name “Hadean” comes from the ...

Scientists agreed the rocky outcrops in a remote part of Quebec, Canada, were ancient. But were they really Earth’s oldest?

A leap second is a one-second modification that is sometimes used with atomic clocks, whenever there is a change in Earth's ...

A mass extinction event wiped out around 90% of life. What followed has long puzzled scientists: The planet became lethally ...

The evolution of planet Earth over 4.5 billion years. Dive into the most dramatic events in Earth’s 4.5-billion-year history, from its birth to the emergence of humanity.

The planet was almost entirely ocean at this phase in its history, and cratons weren’t pushed up from the mantle all at once. We start to get a little closer with the emergence of Kenorland and ...

The Great Oxygenation Event, which occurred around 2.4 billion years ago, was one of the biggest transformations of our planet.Before it, there was practically no oxygen in the atmosphere; after ...

A scientist has warned that Earth's rotation is unexpectedly accelerating, leading to the shortest day in history in just a ...

Scientists have identified three definitive supercontinents in Earth's history and predict the landmasses we live on today will come together again in the future.

Apple TV+'s "Prehistoric Planet" thunders into its second season today with more ancient creatures and curiosities emanating from primeval Earth, offering up the latest theories on dinosaur ...

The Earth has endured many changes in its 4.5-billion-year history, with some tumultuous twists and turns along the way. One especially dramatic episode appears to have come between 700 million ...

Such eruptions are linked with some of the most profound changes in Earth’s history. These include the biggest mass extinction, which happened 252 million years ago when volcanoes blanketed ...