In a gem of a find, scientists have filmed the ruby seadragon, a brilliantly colored fish related to seahorses, in the wild for the first time. The footage, filmed in Western Australia’s ...

A 55.22-carat ruby has become both the largest and most valuable gem of its kind ever to sell at auction, netting $34.8 million on Thursday.

For instance, a 5-Gillette laser can burn through 5 Gillette razor blades. An illustration of the ruby laser, which was the first laser made by Maiman in 1960 after the maser.