Birds, the warm-blooded and feathered vertebrates, are being used to put romantic partners to the test. A relationship experiment dubbed the "bird theory" is making the rounds on social media. It ...

One of the latest relationship tests to go viral is the “bird theory,” racking up millions of views on social media. It’s based on a theory developed by couples researcher John Gottman about the ...

A subsurface atomic test near Yucca Flats, Nev., in March 1955. (U.S. Atomic Energy Commission via AP) In what would be a major shift in a decades-old American policy against global nuclear ...

A ghost of the Cold War is rising between the world’s superpowers, just in time for Halloween. In the wake of Russian President Vladimir Putin bragging about his country testing both a nuclear-powered ...

Decision follows China's expansion of nuclear stockpile Kremlin reacts cautiously to Trump's nuclear remarks Russia's recent nuclear tests include Poseidon super torpedo Pentagon expects Chinese ...

"We've halted many years ago, but with others doing testing I think it's appropriate to do so," the president told reporters aboard Air Force One. Experts say that the resumption of testing would be a ...

Experts warn that Vladamir Putin's claims have not been independently verified. Earlier this week, Russian President Vladimir Putin revealed that his government has finalized testing of a new nuclear ...

Though the country’s nuclear arsenal has undergone no explosive testing for decades, federal experts say it can reliably obliterate targets halfway around the globe. By William J. Broad President ...

The U.S. will immediately begin testing nuclear weapons, President Donald Trump announced in a post to Truth Social Wednesday night. The president said he has ordered the Department of Defense to ...

Fitness band maker Whoop formally opened Whoop Advanced Labs for business on Tuesday. Some 350,000 people were on the waitlist after the service was previewed in May, the company told TechCrunch.

On July 31, President Donald Trump signed an executive order that would bring the set of physical exercises back Christopher Rudolph is a contributing writer for PEOPLE. He previously covered ...