This view from NASA's Cassini spacecraft shows a wave structure in Saturn's rings known as the Janus 2:1 spiral density wave. Resulting from the same process that creates spiral galaxies, spiral ...

Two intriguing signals spotted in a small gravitational-wave detector could represent all kinds of exotic phenomena — from new physics to dark matter interacting with black holes to vibrations ...

Figure 1: Different configurations for signal regeneration using FWM. In summary, we have demonstrated all-optical regeneration of signals at low powers using FWM processes in a silicon nanowire ...

Two intriguing signals spotted in a small gravitational-wave detector could represent all kinds of exotic phenomena — from new physics to dark matter interacting with black holes to vibrations ...