Great works of ancient engineering, like the Pyramids or Stonehenge, inspire awe in every beholder. But some onlookers also get inspired to figure out exactly how these structures were made.
Howard Stone, an engineer from Princeton University, had such a moment in Beijing's Forbidden City — a city-within-a-city of palaces and temples built in the 15th and 16th centuries. A carved, 300-ton slab that formed a ramp to one structure particularly caught Stone's eye. "How in the world did it get here?" he wondered.
These days, you'd be forgiven if you're more excited about watching the "big game" — whether that's football, basketball, hockey — on TV rather than from inside a sports arena. At least, that's a trend that the Chicago-based sports graphics company Sportvision is banking on.
Weight-loss surgery is becoming increasingly popular because it's the only treatment that pretty much guarantees weight loss.
There is very little evidence on how it will affect people's health over the long haul. But people who had surgery maintained substantial weight loss three years later, according to a study that's trying to figure out if it works.