The crater measures roughly 1,600 feet (500 meters ... have yet to find proof of a space rock hitting Earth in this location. Extensive surveys in the 1960s and 1970s failed to find evidence ...

Crater 'significantly challenged previous assumptions about our planet's ancient history' A giant crater 2km across and 170m ...

The impact crater could be linked to the origins of life on Earth. The discovery of a massive crater formed by the impact of a meteorite more than three billion years ago is changing the way ...

It suggests that the world was previously hit by huge impacts that we may not know about, and the craters left behind might ...

A view of Ukinrek Maars in Alaska. The eastern maar (front) is typical of volcanic maars in that it is a deep, round crater filled with water. (Image credit: Nye, C. via USGS) However, there are ...