Innovation in physics often comes from looking at old problems in new ways.

We are at a unique stage in our history. Never before have we had such an awareness of what we are doing to the planet, and never before have we had the power to do something about it.

译文：去偷窃终究是瞒不过家乡的人，偷吃食物瞒不过舌头和牙齿。赏析：人做坏事迟早都会被大家知道，可以瞒得住一时，不能瞒得住一世。