In geopolitical terms, catastrophe theory explains the breaks in world order—the sudden realignments that redefine history. Chaos theory, by contrast, explains the turbulence that precedes and follows ...

When Ella al-Shamahi went to college, she thought she'd be able to prove Darwin's theory of evolution was wrong. Instead, she was convinced the science was right.

No predator today can catch the American pronghorn, yet it runs as if something still chases it. Scientists trace this remarkable speed back to ancient times, when prehistoric cheetahs roamed the ...