What are some of the largest extraterrestrial impacts to effect Earth? Learn what we’ve seen in history, and what is ...

The changes in ocean chemistry were gradual. The Archaean period lasted 1.5 billion years. This is more than half of Earth's history. By comparison, the entire history of the rise and evolution of ...

The changes in ocean chemistry were gradual. The Archean period lasted 1.5 billion years. This is more than half of Earth's history. By comparison, the entire history of the rise and evolution of ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Historically, there have been four oceans: the Atlantic, Pacific, Indian, and Arctic. On Feb. 9, U.S. Secretary of the ...

But while lifeless during that time, the planet was already covered by vast oceans dotted with hydrothermal vent systems that ...

Of the heavy metals spewed by dying stars, the astronomers were particularly interested in iron-60. That’s because iron-60 is ...

existed in Earth’s oceans and atmosphere. So a major implication of the study is that pale-green dot worlds viewed from space are good candidates planets to harbour early photosynthetic life. The ...

existed in Earth's oceans and atmosphere. So a major implication of the study is that pale-green dot worlds viewed from space are good candidates planets to harbour early photosynthetic life. The ...

Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing ...