Gemstones like precious opal are beautiful to look at and deceivingly complex. As you look at such gems from different angles, you'll see a variety of tints glisten, causing you to question what color ...

Create a glowing Aurora pastel drawing inspired by the Northern Lights, with smooth blends, rich colour layers, and a dreamy ...

Learn how to spot Sirius, Procyon and their canine constellations, and discover the myths and science behind the dog stars.