Scientists might be about to completely upend our entire understanding of the universe.
A theory about the speed of light that has long been considered radical and, if proved correct, could potentially alter some of our most basic understanding of the universe is now ready to be tested in an experiment.
The theory challenges one of the most basic ideas of the universe: that the speed of light is fundamental and never changes. That central idea holds together some of the most important concepts in physics, and our understanding of the cosmos, such as general relativity and the way the universe expanded after the Big Bang.
This image of an area on the surface of Mars, approximately 1.5 by 3 kilometers in size, shows frosted gullies on a south-facing slope within a crater. The image was taken by Nasa’s HiRISE camera, which is mounted on its Mars Reconaissance Orbiter
Although Mimas and Pandora, shown here, both orbit Saturn, they …