You know the cavemen, a race of human cousins who lived exclusively in caves? They didn't exist. Sure prehistoric hominids used caves sometimes but they lived in other places too. Luckily the time they spent in caves has given us a glance at their culture thanks to the protective environments of caves.
Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htm
And to learn about your ad choices when listening to podcasts, visit
https://www.howstuffworks.com/privacy.htm#ad-choices