Space-time metasurface makes light reflect only in one direction

Light propagation is usually reciprocal, meaning that the trajectory of light travelling in one direction is identical to that of light travelling in the opposite direction. Breaking reciprocity can make light propagate only ...

Defective software could have doomed Boeing's crew capsule

Defective software could have doomed Boeing's crew capsule during its first test flight, a botched trip that was cut short and never made it to the International Space Station, NASA and company officials said Friday.

Scientists break light modulation speed record -- twice

Researchers have constructed a light-emitting transistor that has set a new record with a signal-processing modulation speed of 4.3 gigahertz, breaking the previous record of 1.7 gigahertz held by a light-emitting diode.

Single-pixel 'multiplex' captures elusive terahertz images

A novel metamaterial enables a fast, efficient and high-fidelity terahertz radiation imaging system capable of manipulating the stubborn electromagnetic waves, advancing a technology with potential applications in medical ...

Watch all six Apollo Moon landings at once

So often, when we think of all the Apollo missions to the Moon, we recall the videos of the astronauts walking, jumping and driving around on the Moon. But the actual landing of the Lunar Module was such a key – if not ...

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