Specifically, physicists and philosophers tend to conflate what it means for something to exist and what it means for ...

Physicists tested light speed using cosmic gamma-ray bursts. Study confirms Einstein's prediction that all light colors travel at same speed.

Light speed would allow instant trips across Earth and minutes to reach the Sun, but even at 300,000 km/s the expanding ...

NASA’s Voyager 1 space probe will continue its almost half-century of service by delivering yet another milestone.

Physicists have demonstrated with unprecedented accuracy that the speed of light remains constant. In 1887, a landmark physics experiment was carried out by American researchers Michelson and Morley.

In a cafe at CERN in 1992, three physicists realized they disagreed about how many constants are needed to describe all of nature. A recent paper suggests only one – time – is necessary.

In 1887, one of the most important experiments in the history of physics took place. American scientists Michelson and Morley ...

Several leading quantum gravity theories predict that there is a dependence of the speed of light on photon energy, which would bridge incompatibilities between general relativity and quantum physics.

WASHINGTON (AP) — President Donald Trump signed a government funding bill Wednesday night, ending a record 43-day shutdown that caused financial stress for federal workers who went without paychecks, ...