Astronomers have historically turned to two disparate methods to understand the Universe. Telescopes have traditionally been used to observe galaxies, while scientists have recently attempted to simulate them on large computers. Now a theoretical astrophysicist has revealed the early results of "a third way" - a novel method offering new insights into galaxy formation and the role dark matter plays in it. Professor Peter Behroozi of Arizona University is leading a team harnessing NASA's Pleiades supercomputer to generate millions of Universe simulations, each following a different theory of galaxy formation. He told Express.co.uk: "Telescopes can see lots of galaxies in exquisite detail but they are only tiny snapshots of their histories. "Galaxies take hundreds of millions of years to evolve and of course, during a human lifetime, we can't even see a tiny fraction of that, so can't tell how does they evolved with observations alone. "Simulators are inputting all the physics they knew