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An ancient tree revealed the tale of Earth's magnetic field reversal
A perfectly preserved ancient tree fossil offered scientists an unprecedented view into a moment 42,000 years ago when the Earth’s magnetic field went haywire. The compelling 2021 study tells the ...
Near-Earth asteroid Bennu could hit Earth in 157 years and set off a global ‘impact winter,’ study says
Near-Earth asteroid Bennu has a slim chance of colliding with Earth in 2182. If it does, the impact could trigger a global ...
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2 huge asteroid strikes 36 million years ago didn't change Earth's climate over the long haul, study finds
Two enormous asteroids that struck Earth about 36 million years ago did not cause any long-lasting ... that Earth's climate did not swerve in the 150,000 years following the asteroid strikes ...