The light did not fade the way it was supposed to. After blazing into view about a billion light-years from Earth, the ...

The results reveal that our universe is reverberating with cosmic collisions. Some of the waves stem from pairs of black ...

It is one of history’s more irritatingly on-brand coincidences that Albert Einstein was born on Pi Day, as though the universe itself decided that if it was going to manufacture the patron saint of ...

Theoretical physicists have spent decades wrestling with a disorienting possibility: that the flow of time is not woven into the basic laws of physics but instead emerges from gravity’s effect on heat ...

Physicists have long struggled to unite quantum mechanics—the theory governing tiny particles—with Einstein’s theory of ...

For decades, astronomers have used distant supernovae as cosmic lighthouses to test fundamental physics and to measure the ...

3D-printing specialist Relativity Space signed an expansion deal with NASA's Stennis space center in Mississippi. Relativity will build new infrastructure and facilities on more than 150 acres at the ...