Fifteen international agencies spend $62 billion every year on space travel. What's fueling our costly — and dangerous — drive to explore the universe?
Once a secret military program, GPS now guides our daily lives, from providing directions to finding friends. But what do we trade for this convenience?
Credit cards changed the global economy and attitudes about personal spending, but record levels of consumer debt beg the question: Just who's in charge?
Growing evidence suggests that psychedelic drugs could treat brain injuries and psychological problems. But can we get past their controversial history?
They're used for everything from entertainment to medicine — and now for weapons straight out of science fiction. Have lasers become too hot to handle?
