Although some compelling evidence exists to support the idea that a repulsive force similar to dark energy exists, it has yet to be directly observed or measured.
To circumvent this uncomfortable missing piece of the cosmological puzzle, physicists have developed alternative theories explaining the acceleration of universal expansion that don’t rely on dark energy.
A new theory, posited by a physicist at the University of Alabama in Huntsville, suggests that multiple singularities blinking in and out of existence could provide the energy and matter seen in decades of observations.