The U.S. has pressed Argentina and Chile to review two Chinese telescope projects in the Andean deserts. Astronomers are worried about setbacks to research.

The Russian military has yet to solve a fundamental problem: how to make big advances in eastern Ukraine when drones are everywhere.

The exact wrong answer to a Republican Party that’s flirting with fascism is a man who chose to put vile Nazi imagery on his own body.

Vice President JD Vance and Secretary of State Marco Rubio are boosting their profiles, generating speculation about who’s lining up for the 2028 presidential nomination.

Iran was already struggling economically before 2026 brought widespread instability. A government-imposed internet shutdown has crippled an entire sector.

Five candidates are battling for the nomination in the June 2 primary. The winner will oppose Rob Sand, a Democrat, in the November election.

Near Hudson, N.Y., a Princeton University team erected a cottage made from the agricultural byproduct, which they said is more sustainable than bricks or concrete.

As the former mayor seeks help from the World Trade Center Health Program, an episode where he helped his predecessor John V. Lindsay carries resonance.