A research team is using astrophysical explosions to understand the mysterious forces at work in some of the smallest ...

William Neil McCasland, 68, was reported missing after leaving his Albuquerque, N.M., home on foot Feb. 27, according to local authorities, who have teamed up with the FBI to find the former military ...

Solar winds and coronal mass ejections may scatter narrow signals, making them harder for Earth-based telescopes to detect. The SETI Institute uses radio telescopes to search for signs of intelligent ...

Donald Trump delivers the State of the Union address. Photo by Andrew Harnik/Getty Images Donald Trump is delivering his State of the Union address, amid sagging poll numbers, a recent Supreme Court ...

In his first State of the Union address of his second term, President Donald Trump on Tuesday faced down critics and broke a record for length—touching on everything from undocumented immigrants to ...

Get highlights on Trump’s 2026 State of the Union address as he speaks before Congress on the current U.S. state of affairs.

Add Yahoo as a preferred source to see more of our stories on Google. During the late 1960s, a top-secret Soviet program to sneak nuclear weapons around U.S. early warning radars was mistaken for a ...

During the late 1960s, a top-secret Soviet program to sneak nuclear weapons around U.S. early warning radars was mistaken for a rash of UFO sightings by Moscow’s citizens. The weapon, known as FOBS, ...

The United States and private space companies are advancing ambitious lunar and deep-space programs centered on nuclear power systems. Nuclear technologies, including radioisotope systems and fission ...

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

To hell with your Fermi paradox: we’ve got presidential declarations. During a podcast interview with political commentator Brian Tyler Cohen released Sunday, former president Barack Obama casually ...

China is building out and redesigning sites connected to its nuclear weapons program, according to a new report, as the lapse of the world's last treaty limiting nuclear weapons has fueled fears of a ...