In a video message, the mayor of New York City said he could not legally arrest Israel’s prime minister but reinforced his position as a voice of the international left.

Nuclear experts say it throws fuel on the smoldering fire of atomic proliferation, creating a destabilizing situation that could raise the risk of nuclear war.

Michael Kratsios, President Trump’s science adviser, proposed overhauling how the government funds research. Democrats said Mr. Trump’s actions had weakened science.

Saudi Arabia has for years sought a deal to obtain American nuclear technology. The agreement, signed on Wednesday, could deepen U.S.-Saudi ties for decades to come.

The calendar order could be hugely important to the 2028 presidential primary race. Democratic insiders will try to sketch out a schedule this week, and rival states are sniping at one another.

Transmissible tumors have been reported in a handful of animal species, but never before among fish. Is it possible in humans?

The iconic Cinerama Dome and adjacent 14-screen theater complex will reopen in 2028 after a renovation. The venue closed in 2020 because of the pandemic.

Is celibacy cool now?

Tens of thousands of immigrants have received letters to pay up or leave, as the government enlists debt collectors and seizes tax refunds.