In this iconic Nickelodeon kids science show from the 1980s, Don Herbert (Mr. Wizard) and several children explore and discover what makes the world tick.
EARTH'S CIRCUMFERENCE: Mr. Wizard does a demonstration with Giselle using a large, round wooden tabletop and they note the measurements of the shadows cast by lengths of straws on the perimeter of the circle.
S4E6 25 min
