On April 21, 1972, NASA astronaut John W. Young, commander of the Apollo 16 mission, took a far-ultraviolet photo of Earth with an ultraviolet camera. Young's original black-and-white picture was ...

They might not realise there is a safer vein to use, so we have vein finders - that's a device that shows healthy ones. "All our staff are trained in emergencies so if someone overdoses we can ...

And yet, it was. This new MicroLED goes further into the skinny end of the electromagnetic spectrum than competing types by incorporating four ultraviolet LEDs per pixel. By contrast ...