Global Climate Change and Energy

Is the world getting warmer? The global temperature changes over the past 150 years, would indicate that the the answer is "YES!" But what if we look at the past 1,000 years, 100,000 years or more? And why should YOU care if indeed our world is getting warmer?

The Meter: A Measurement for All People and All Times

This is the story of the creation of the meter, now the accepted standard of length measure almost everywhere in the world.