Our Milky Way galaxy was not always a spiral. Here's how it changed shape
A century-old mystery of how galaxies shift shapes has been solved by considering "survival of the fittest" collisions between cosmic titans also revealing the Milky Way was not always a spiral.
TroibNews 
A century-old mystery of how galaxies shift shapes has been solved by considering "survival of the fittest" collisions between cosmic titans also revealing the Milky Way was not always a spiral.
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