SpaceNASA engineer's 'helical engine' may violate the laws of physics A NASA engineer has published plans for an engine that could accelerate a rocket without using propellant. But there are questions over whether it could work News
Physics50-year old maths problem about an infinite lottery finally solved A 50-year-old maths problem has finally been solved, and it shows that even an infinitely large lottery ticket could not contain every winning solution News