U.K. debt is selling off amid a leadership crisis, sending ripples through other developed-country bond markets. Ten-year gilt yields hit their highest level since 2008 and 30-year yields their ...

The 3-body problem looks simple: three objects, one gravitational system. But it reveals something shocking — even basic gravity can become unpredictable, chaotic, and impossible to solve perfectly.

Higher education is under stress. The highest-profile threat has been the Trump administration’s efforts to cut funding to several universities, including Harvard, Columbia and Northwestern. Research ...