From brilliant blues to fiery reds, discover how nature crafts diamonds in every color, and why some shades are rarer than ...

0:36 Glowing spiral floats through U.K. night sky People across Europe witnessed a mysterious glowing blue spiral in the night sky this week, and scientists say they think they know what caused ...

A blue and white spiral in the night sky is seen from Sweden. (Bertrand Ilhe / AFP via Getty Images) ...

A glowing blue spiral was spotted in European skies on Monday evening, causing a stir on social media. The swirls were seen across Europe with reports of sightings from the United Kingdom ...

A glowing blue spiral was spotted in European skies on Monday evening, causing a stir on social media. The swirls were seen across Europe with reports of sightings from the United Kingdom, France, ...