The Harvard astrophysicist has devoted years—and thousands of interviews—to the idea that mysterious objects streaking ...

Somewhere out there, a planet roughly the size of Earth may be orbiting a distant star in conditions that could support life.

Claims of an 'arms race' involving Russia and China, reverse-engineering, and crashed alien spacecraft re-emerged this month ...

Today:Early fog in the far southwest clears quickly. Most areas stay dry with sunshine and variable cloud, though northern and northeastern regions may see isolated showers. Light winds overall, ...

The AI boom is creating odd political bedfellows fueled by populism as politicians from Vermont Sen. Bernie Sanders to President Donald Trump embrace giving the public a stake in AI’s growth.

A lobbying campaign by tech and AI industries has led the Trump administration to reverse a new green card policy, allowing exemptions for those providing economic benefits or serving national ...