Besides particles like sterile neutrinos, axions and weakly interacting massive particles (WIMPs), a leading candidate for the cold dark matter of the universe are primordial black holes—black holes ...

Imagine taking a trip to the outer reaches of our Solar System, to a place few have ever seen up close. Uranus, the icy giant, is a world of extremes, violent, cold, and unlike any other planet you ...

A decade ago, Kari Leibowitz traveled to Tromsø, a city located above the Arctic Circle in Norway, to study a curious phenomenon. Although the city experiences polar night, a time of darkness when the ...

Three children were reported missing around 8:30 p.m. July 30, which is after sunset along North Carolina’s Outer Banks. They were found by the U.S. Coast Guard, but had become separated in the dark.