SpaceStarship launch: Fourth test succeeds as both stages splash into sea SpaceX's Starship has been to orbit and back in its fourth flight test, with both rocket stages soft landing in the ocean, though parts of the spacecraft appeared to be damaged during descent News
PhysicsHow indefinite causality could lead us to a theory of quantum gravity Experiments show that effect doesn’t always follow cause in the weird world of subatomic particles, offering fresh clues about the quantum origins of space-time Features