In physics, to qualify as another reality means it must lie beyond the four known space-time dimensions. Such a realm must also be inaccessible, like public restrooms in the Big Apple. Good examples, ...

Out in the Kuiper Belt, the massive doughnut of debris beyond Neptune, about one in 10 kilometer-scale objects have surprised scientists with their unexpected shape. Rather than resembling a ball, ...

For the first time ever, scientists have observed in near real time a cloud of air pollution created as space debris burned up in Earth's The breakthrough measurement ...