Nanotechnology

Color La Chaux-de-Fonds (Switzerland) Nanotechnology Oris SA Positive Coating Studer, Rolf Watches and Clocks

Watches That Can Reflect the Colors of the Rainbow

New techniques and processes create case finishes that appear to change hue as the wearer moves.

By Aurelien Bergot for The New York Times

Computer Chips International Relations International Trade and World Market Nanotechnology Politics and Government Regulation and Deregulation of Industry Smartphones

The Multimillion Dollar Machines at the Center of the U.S.-China Rivalry

The United States is taking unusual action to clamp down on sales of chip-making machinery to China, even as Chinese firms are racing to stockpile the equipment.

By Ana Swanson Don Clark and Mara Hvistendahl