Articles on Craters

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Overhead view of the fossil of Epiatheracerium itjilik. About 75 per cent of the animal’s bones were recovered, including diagnostic parts such as the teeth, mandibles and pieces of the cranium. (Pierre Poirier/Canadian Museum of Nature)

Epiaceratherium itjilik: The rhino that lived in the Arctic

Remains of an ancient Arctic rhino indicate that land mammals traversed the North Atlantic via land bridges, and did so much more recently than previously thought.
A satellite image of the Clearwater Lakes, the site of two large asteroid impacts that struck Earth about 290 million years ago. (NASA Earth Observatory)

Cubic zirconia only forms under extreme temperatures, like those produced when an asteroid impacts Earth

Cubic zirconia, a popular diamond substitute, only occurs naturally under extreme conditions. Finding cubic zirconia in craters reveals parts of the Earth’s history.
Astronomers can estimate ages for stars outside the Solar System, but not planets. Corbis Historical via Getty Images

How do astronomers know the age of the planets and stars?

Measuring the ages of planets and stars is tricky. An observational astrophysicist describes the subtle clues that provide good estimates for how old different space objects are.
An illustration shows how, about 65 million years ago, a large asteroid collided with Earth. It hit what is today Mexico and created the Chicxulub crater. Mark Garlick/Science Photo Library/Getty Images

Curious Kids: Why are there so few impact craters on Earth?

Impact craters are relatively shallow, so these bowl-shaped “dents” in Earth’s rocky crust can be easily buried or erased by erosion.
The ancient landscape at Yarrabubba preserves traces of the world’s oldest known asteroid impact. Shutterstock

We found the world’s oldest asteroid strike in Western Australia. It might have triggered a global thaw

The Yarrabubba asteroid landed 2.2 billion years ago. Around the same time, the icy Earth went through a big thaw.
Look at the circular patterns on the Moon’s surface, as seen from Earth. Flickr/Bob Familiar

Why the Moon is such a cratered place

The Apollo missions to the Moon helped our understanding of the cosmic origin of craters on our lunar neighbour, and here on Earth.

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