Geologists have now unearthed evidence of a 3.5 billion-year-old crater found in a layer of Australian rock. Shatter cones, which are features caused by the shockwave of a hypervelocity meteorite ...

Credit: Graeme Churchard / CC BY 2.0 Researchers have confirmed the Yarrabubba crater in Australia as the oldest asteroid crater on Earth, dating back 2.229 billion years. This oldest asteroid impact ...

James Turrell discusses his ongoing land art piece, Roden Crater, created within a pit formed by an extinct volcano in the Arizona desert. ART21: Where are we, right now? TURRELL: Well, right now ...

32,404 people played the daily Crossword recently. Can you solve it faster than others?32,404 people played the daily Crossword recently. Can you solve it faster than others?

Skin ulcers are crater-like, open wounds on the skin. Ulcers are roughly circular with a raw center. They often have thick and raised outer borders and may leak clear fluid, blood, or pus. Skin ulcers ...

It looks like you're using an old browser. To access all of the content on Yr, we recommend that you update your browser. It looks like JavaScript is disabled in your browser. To access all the ...