Scientists think they've finally solved the decades-long mystery of why our Milky Way galaxy is so rare

Scientists think they've finally solved the decades-long mystery of why our Milky Way galaxy is so rare

Illustration of what the Milky Way Galaxy may look like to a distant observer. Courtesy of NASA <ul><li>Spiral galaxies like the Milky Way are surprisingly rare in our galactic neighborhood.</li><li… [+1973 chars]

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