Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

On January 19, 2025, let the stars guide your journey! Whether you’re looking for insights into relationships, career ...

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 ...