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Some say that the reason you can't travel faster than light is that your mass will increase as your speed approaches light speed – so, regardless of how much energy your star drive can generate, you reach a point where no amount of energy can further accelerate your spacecraft because its mass is approaching infinite.

Alexandra Mor had been eyeing the stone for weeks: an 85.30-carat, cabochon-cut emerald about the size of a plump strawberry. Mor, a jewelry designer in New York, was hesitant to purchase it because its color was uneven and it was dappled with inclusions.