Since its discovery in 1977, the Wow! Signal has puzzled radio astronomers. The Ohio State University Big Ear radio telescope found this powerful 72-second narrowband radio signal. The signal was ...

A magazine journalist's account of being added to a group chat of U.S. national security officials coordinating plans for airstrikes has raised questions about how highly sensitive information is ...

The Pentagon’s latest report makes one thing clear: Signal protects conversations, but it was never designed to safeguard U.S. war plans — and using it that way carried real risk for American forces.