Fearnley (2020, Ref. 2) shows that if positrons, the antiparticles of electrons, travel backwards in time then the Bell’s Theorem experiment correlation result (Wikipedia, Ref. 5) can be achieved using classical physics calculations. This would involve a mundane bypassing of the Bell Inequalities instead of a spooky breaking of them. Fearnley (Aug. 2018, Ref. 7 and July 2018, Ref.8) and Farnes (Dec. 2018, Ref. 9) show that particles with negative mass can explain gravitationally both dark energy and dark matter. The current paper brings together these two models in one place and gives an antiparticle with negative mass and also travelling backwards in time. In this paper the idea is raised of a specialised type of space to be the environment of antiparticles, where the space occupied by antiparticles is an opposite-handed (geometric algebra) space to the space occupied by particles. The universe as a whole occupies the same handedness of space as does particles. Time runs backwards in the space of antiparticles compared with the direction of time for the universe and for particles.