Three people have been shot at an Immigration and U.S. Customs Enforcement office in Dallas and the shooter is dead from a self-inflicted gunshot wound, the agency’s director said.

Ancient life on Mars? Perseverance’s “Sapphire Canyon” rock shows organics and mineral rings—our strongest potential ...

Controlling boron concentration at grain boundaries in platinum nanocatalysts prevents structural failure and preserves catalytic performance under prolonged high temperature conditions.