The Laboratory in Blue Prince is home to two puzzles: the periodic table puzzle and the machine puzzle. Both puzzles are ...

A rare diamond exhibit in Abu Dhabi, United Arab Emirates, featured a special blue diamond, with the exhibit's worth totaling $100 million amid the display of 700 total carats of diamonds.

A rare blue diamond, worth $100 million, was displayed at an exhibition on of the world's rarest diamonds in the United Arab ...