A new study of lunar minerals has captured the last stage of the moon solidifying into rock. A full moon is visible above icebergs in Disko Bay, Greenland. Scientists studying lunar samples brought ...

New research suggests that as Earth traveled through space over billions of years, its movements in and out of the spiral arms of the Milky Way (seen here from the top of Cerro Armazones, Chile) may ...

It's a type of dental crown. Dental crowns are tooth-shaped covers or caps you can use when your tooth is damaged, misshapen, or decayed beyond what a filling can fix. They fully cover your tooth, ...

Exposing blue zircon to long-wave ultraviolet (LWUV) radiation introduces a brown coloration, resulting in a somewhat unattractive, much less valuable gemstone. Common sources of accidental long-wave ...

Figure 1. Pleochroism in a 15 ct tanzanite, as seen with the unaided eye through the crown and the pavilion sides and ends. Photo by Wimon Manorotkul. In describing colored gemstones, the major ...