What If There Was Another Earth in Our Solar System?
By What IfFrom youtube.com
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About 65 million years ago, a mass extinction event occurred, wiping out more than 75% of all species on Earth. There have only been 5 mass extinctions in our planet's 4.5 billion year history. But the next one has already started.
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what if
scifi
sun
the sun
solar system
moon
rad
ganymede
nasa
earth
space
cosmos
planets
neptune
jupiter
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