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CNN, The science
28-May-2020 Thursday
The Tunguska explosion could have been caused by an asteroid that is still orbiting the Sun
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The Tunguska explosion could have been caused by an asteroid that is still orbiting the Sun
Astronomy
Meteorite
The science
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Tunguska meteorite
26-February-2016 Friday
Scientists have created sperm cells in a test tube
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CNN
The science
Sperm
Sperm
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