The turn-of-the-century Tiffany & Co. ring is centered by an oval-cut sapphire the auction house describes as “rare quality” and a “deep and rich blue.” It’s flanked by European-cut ...

View of the hominin tibia and magnified area that shows cut marks. Scale = 4 cm. In a new study published today, June 26, in Scientific Reports, Smithsonian’s National Museum of Natural History ...