Since the late 20th century, astronomers have been aware of data that suggest the universe is not only expanding, but expanding at an accelerating rate. According to the currently accepted model, this accelerated expansion is due to dark energy, a mysterious repulsive force that makes up about 73% of the energy density of the universe. Now, a new study reveals an alternative theory: that the expansion of the universe is actually due to the relationship between matter and antimatter. According to this study, matter and antimatter gravitationally repel each other and create a kind of “antigravity” that could do away with the need for dark energy in the universe.
Astronomers use AI to shed light on dark energy - Big Think
Cosmic coincidence
What Is the Geometry of the Universe? : r/cosmology
r/physicsmemes
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Dark Energy Archives - Page 9 of 10 - Universe Today
PPT - Space News Update November 18, 2011 - PowerPoint Presentation, free download - ID:5908081
Since gravity is caused by mass, does that mean humans have gravity, too? - Quora
Like It or Not, Dark Energy Is Real - Reasons to Believe
Antigravity Could Replace Dark Energy as Cause of Universe's Expansion - Universe Today