Northern Lights, Gas Pressure, and more. Shan is going on a safari in a freshwater pond and Mr. Wizard shows her a supply of tools she is going to use to gather and inspect her catches. In this episode, Mr. Wizard shows Microscopic Safari Part 1 and 2, Gas Pressure and Temperature, White-Tailed Deet, Cantilevered Books, Collapsed Soda Bottle, Longer than Tall, Northern Lights, and Coordinated Systems.