The idea of matter with negative mass is mind-boggling: A –5 kg object would repel a +5 kg object, while the +5 kg object would attract the –5 kg object. As a result, the two of them would move off in the same direction along the line joining the two, with the negative-mass object following the positive-mass object indefinitely. However, despite that craziness, some physicists open to the idea that the universe contains negative-mass matter.
Theoretical physicist Manu Paranjape explains why.
Article:http://physicstoday.scitation.org/do/10.1063/PT.6.3.20170524a/full/
Photo:
The large-scale structure of the universe, simulated here, may have been influenced by the presence of negative mass during the inflationary epoch. Credit: Springel et al. (Virgo consortium), Max Planck Institute for Astrophysics
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