Two days of talks resulted in a “framework” meant to solidify terms of a deal that the superpowers reached in Geneva last month.

© Toby Melville/Reuters

Since early April, China has stopped almost all shipments of critical minerals that are needed for cars, robots, wind turbines, jet fighters and other technologies.

© Keith Bradsher/The New York Times

The deviant behavior of a subatomic particle might point to undiscovered forms of matter and energy in the universe. Or it might not.

© Reidar Hahn/Fermilab