What are the two main types of night vision? How can you see heat? Why do some night vision systems only display in monochromatic green? Join Jonathan and Chris as they explore the tech behind night vision.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices
