In this episode, Mike and Chad finish discussing how units are currently defined and how they have changed through time.  The kilogram has now been redefined so that it is no long based on the mass of a particular hunk of metal in Paris.  We also talk about the various units for temperature.

If you have an idea for a future episode, or you would like to know even more about units and measurements, email us at crisscrossingsci@gmail.com and we will try to work something into a show.