industrial revolution

People who lose track of time aren't rude, researchers say — they may just be listening to their inner timekeeper instead of an external clock. Living according to "event time" has its benefits.

Some archaeologists excavate Roman ruins. Others dig up garbage. In England, a project is underway to study what people threw out in Victorian times, to learn about the start of the consumer era.

Some scientists suggest calling the era we live in the Anthropocene, to denote the time when humans came to dominate Earth's fate. But did it start with farming, the atom bomb or another event?