The U.S. and China, two of the world’s largest economies, broke new territory in trade negotiations over rare earth elements.

Tom Lehrer, the Harvard-educated mathematician whose brief side gig as one of America’s favorite satirical composers captured in tune some of the anxieties and absurdities of the 1950s and 1960s, has ...

Optical clocks are typically evaluated on two levels — accuracy (how close a clock comes to measuring the ideal “true” time, ...