Existing sources of sound energy from traffic and urban noise pollution, however, are all-too-reliable nuisances to merit experiments with harvesting thunder.

But when they are combined with other experiments’ data from supernovae surveys and the cosmic microwave background, the confidence that dark energy is indeed wavering approaches 99.997 percent ...

In a breakthrough that challenges conventional physics, scientists have confirmed the existence of “second sound” — a phenomenon where heat travels as a wave rather than dispersing slowly ...