If there is an absolute law in the universe, it’s that nothing can travel faster than the speed of light. Space is big, and ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to ...

Astronomers have traced the hidden fingerprints of dark matter by observing rare, glowing galaxies that lived in the early ...

Bob Giddings Green Bay, Wisconsin Calculating the total mass of the universe is not simple, because most of the mass is invisible. In a pie chart of the contents of the universe, only 5 percent is ...

Scientists using a global array of radio telescopes have detected the universe’s lowest-mass dark object by observing how it ...

Most cosmologists believe that these stars were the first large, free-floating structures to illuminate our universe, and ...

A neutrino sensor array, ARCA, lines the Mediterranean seafloor near Sicily. A physicist took ARCA’s first huge win to a warm ...

Primordial black holes are hypothetical black holes thought to have formed moments after the Big Bang. Because they supposedly formed about 14 billion years ago, and black holes are thought to ...