Space startup Exodus Propulsion Technologies claims to have achieved a breakthrough, stumbling upon an entirely new force of nature that could power thrusters that don't need propellant to work.As The Debrief reports, co-founder Charles Buhler — a former NASA engineer who's worked on a number of major programs including the International Space Station, the Hubble Space Telescope, and the Space Shuttle — said the discovery could be a major turning point in humanity's quest to explore space.Buhler...