The mystery of stalling black holes may finally be solved

Six decades ago, human spaceflight was a two-sided coin, as the United States and Soviet Russia competed for primacy in the Space Race during the Cold War. With global nuclear holocaust looming menaci

While many visitors are drawn to Turkey for its southern beaches and inviting coves, those in the know also come for scenic train routes, hikes through cave cities and traditional taverns surrounded by ancient Greek, Roman and Byzantine relics. Plan your own adventure with these country highlights

CHINA’S GROWING PRESENCE IN THE ARCTIC IS INFLAMING TENSIONS WITH THE US

“I’m one of those wacky wild swimmers,” he says. “Rain or shine, summer or winter, regardless of what country I’m in, I try and find someplace.” To justify the appeal, he draws on nature writer Roger

THE MOST DOMINANT FORCE IN THE UNIVERSE IS ALSO ITS MOST MYSTERIOUS AND MOST UNANTICIPATED

Discover the zealous leaders who kickstarted centuries of holy war