There's a problem with our theory of the universe: Even after more than a century of research, we can only explain 5 percent of it. The rest is "dark" — invisible, unidentified matter that we can only detect from the pull of its gravity. While scientists get to work on understanding these mysterious substances — called dark energy and dark matter — one researcher is trying something different. What if dark energy and dark matter aren't two substances, but one? It might sound overly simplistic, but there are some good reasons to believe that this negative-mass "dark fluid" could really exist.
The Missing 95%
Why Not Both?
3D Simulation of an Expanding Negative-Mass Universe
Written by Ashley Hamer January 4, 2019
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