Our understanding of gravity can explain why an apple falls from a tree and how our planet orbits the sun. But when it comes to the most gigantic things in the universe — from galaxies on up — our current theories fail us. The leading contender for explaining why big things don't behave like they should is a theoretical substance called dark matter. But we've never directly seen it, and worse, it doesn't fully explain the mystery. There's a vocal minority that says dark matter doesn't exist at all. Instead, it's our understanding of gravity that needs tweaking. Who's right?
One of These Things Is Not Like the Other
Does Dark Matter Break Physics?
Written by Ashley Hamer August 28, 2018
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