Gemstones like precious opal are beautiful to look at and deceivingly complex. As you look at such gems from different angles ...

The new technique generates an image (top right) from the speckle pattern created when light from the coloured numerals (top left) is scattered by the mostly opaque surface in the middle. (Courtesy: M ...

Much like cassette tapes, land lines, and broadcast TV, one day, “some assembly required” might be a phrase that’s completely foreign to kids, as researchers at North Carolina State University take ...