Human Gravity, Growing Vegetables, Shaker Balance Trick, Arson, Thermostat, Patterns and more

A line has been drawn down the center of a mirror. Clara is to her keep nose on the line while moving a leg to one side. When she does, her nose moves off the line on the mirror. Mr. Wizard explains, Human Center of Gravity, Growing Vegetables, Salt Shaker Balance Trick, Investigating Arson, Thermostat, Microscopic Spirogyra, Eagles and Power Lines, and Moire Patterns.