An asteroid slammed into Earth 2.2 billion years ago during an ice age, and now studies say that may have changed Earth's climate.
Doyle RiceSome 2.2 billion years ago, an asteroid slammed into the Earth, leaving behind a massive, 43-mile-wide crater in what's now Western Australia, scientists announced Tuesday.
The impact left behind a scar on the land that's known as the Yarrabubba impact crater."The age we've got for the Yarrabubba impact structure makes it the oldest impact structure on the planet," study co-author Chris Kirkland, a geologist at Australia's Curtin University, told the Australian Broadcasting Corp.
The Yarrabubba crater in Western Australia is now believed to be the world's oldest impact crater, at some 2.2 billion years old.The Earth has a continually changing surface due to tectonics and erosion, which means that very old impact craters are difficult to identify, the study said. Scientists analyzed minerals within the crater that revealed the precise age for the impact event.
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The Earth was once a snowball. An asteroid impact two billion years ago may have changed thatThe Yarrabubba impact crater in Western Australia is the oldest in the world.
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The Earth was once a snowball. An asteroid impact two billion years ago may have changed thatThe Yarrabubba impact crater in Western Australia is the oldest in the world.
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