People measure modern temperature records using instruments. Records only cover the last 150 years or so. The '''temperature record of the past 1,000 years''' or more is found by using data from what are called "climate proxy" records. | People measure modern temperature records using instruments. Records only cover the last 150 years or so. The '''temperature record of the past 1,000 years''' or more is found by using data from what are called "climate proxy" records. |