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Earth's 'Bigger, Older Cousin' Maybe Doesn't Even Exist
In 2015, to great fanfare, NASA announced a planet discovery considered a milestone in the hunt for another Earth. But now some researchers say it's not clear that this planet actually exists.
Read more on NPR
Earth's 'Bigger, Older Cousin' Maybe Doesn't Even Exist
In 2015, to great fanfare, NASA announced a planet discovery considered a milestone in the hunt for another Earth. But now some researchers say it's not clear that this planet actually exists.
Read more on NPR
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