SpaceBlack holes and lasers could let us cheat at interstellar travel Firing a laser at a pair of black holes can produce more energy than you start with, letting you travel the galaxy without needing a large amount of fuel News
SpaceYoung Saturn gave Jupiter the building blocks for its big moons After Jupiter formed, it likely had no nearby material to build moons. Young Saturn may have tossed rocks at the gas giant that grew into its four biggest moons News