--- description: Evidence of 250-mile wide impact zone found deep underground title: World's Largest Asteroid Crater Unearthed in Australia image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production --- * [Science](/section/science/) ## Science Update your preferences in [Account Settings](/account/preferences/) Close * [Archaeology](/tag/archaeology/) ## Archaeology Update your preferences in [Account Settings](/account/preferences/) Close # World's Largest Asteroid Crater Unearthed in Australia  by [Jack Linshi](/author/jack-linshi/)  ## Jack Linshi Update your preferences in [Account Settings](/account/preferences/) Close Mar 23, 2015 7:28 PM CUT  by [Jack Linshi](/author/jack-linshi/)  ## Jack Linshi Update your preferences in [Account Settings](/account/preferences/) Close Mar 23, 2015 7:28 PM CUT Scientists have discovered evidence of a 250-mile wide crater in central Australia they believe was created by a colossal asteroid hundreds of millions of years ago. The largest impact zone ever discovered is no longer visible on the Earth’s surface, researchers from the Australian National University said [in a statement](http://www.anu.edu.au/news/all-news/worlds-largest-asteroid-impacts-found-in-central-australia "undefined") Monday, but could be identified by evidence buried deep in the earth’s crust. The scientists had been drilling for another geothermal research project when, by chance, they came across rock layers that had been turned to glass, which usually signifies a high-energy impact. Their findings, published recently in the journal [_Tectonophysics_](http://www.sciencedirect.com/science/article/pii/S0040195114006477 "undefined")_,_ contributes to the understanding of the Earth in prehistoric times. “Large impacts like these may have had a far more significant role in Earth’s evolution than previously thought,” said lead researcher Andrew Glikson. Still, the exact details of when the impact occurred remain unclear. While the rocks surrounding the impact zone are around 300 million years old, scientists said they have not yet found a similar layer in other sediments the same age. “It’s a mystery — we can’t find an extinction event that matches these collisions,” Glikson said. “I have a suspicion the impact could be older than 300 million years.” ### PHOTOS: This Astronaut's Images of Earth Look Like Beautiful Abstract Paintings  "Harsh land. Windswept valleys in northern #Africa"—Alexander Gerst via Twitter on July 6, 2014 Alexander Gerst—ESA  "Land use in South Africa, you can see where water is."—Alexander Gerst via Twitter on July 9, 2014. 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Can you spot them?"—Alexander Gerst via Twitter on July 9, 2014 Alexander Gerst—ESA ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/3754917/asteroid-impact-australia/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/3754917/asteroid-impact-australia/"},"headline":"World's Largest Asteroid Crater Unearthed in Australia","datePublished":"2015-03-23T19:28:20.000Z","dateModified":"2026-05-11T05:04:54.859Z","description":"Evidence of 250-mile wide impact zone found deep underground","url":"https://time.com/3754917/asteroid-impact-australia/","keywords":["Archaeology","Environment","Space"],"thumbnailUrl":"","author":[{"@type":"Person","name":"Jack Linshi","jobTitle":null,"url":"https://time.com/author/jack-linshi/"}],"articleSection":"Science","image":[],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/science/","name":"Science"}},{"@type":"ListItem","position":2,"item":{"@id":"/tag/archaeology/","name":"Archaeology"}},{"@type":"ListItem","position":3,"item":{"@id":"https://time.com/3754917/asteroid-impact-australia/","name":"World's Largest Asteroid Crater Unearthed in Australia"}}]},{"@context":"https://schema.org","@type":"VideoObject","name":"How to Hunt for New Earths","description":"At the W.M. 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