The elusive phenomenon known as dark matter may not actually exist, according to a University of Alabama astrophysicist, due to the possibility that gravity—an effect caused by the curving of the fabric of spacetime—may exist on its own in the absence of mass, despite the long-held assumption that gravity isread more
A veteran NASA engineer has announced that his private company has made a major breakthrough in electrostatic propulsion, with one of their test devices producing at least one Earth gravity of force using only an electrical charge—without the use of any propellant. He believes that their devices may be demonstratingread more
Ever since astronomers Konstantin Batygin and Michael Brown hypothesized in 2016 that an undiscovered planet hidden in the far reaches of the solar system was responsible for the odd orbits of the dwarf planets that lurk there, astrophysicists have searched in vain for this enigmatic ninth planet. But other theories have alsoread more
A team of researchers studying the dynamics of meltwater lakes that form on the surface of Greenland’s glaciers has discovered a previously-undiscovered source of heat that is melting the world’s largest island’s ice sheets from the bottom up: the sheer force of the meltwater draining to the bottom of theread more