If you’ve ever wondered about the popularity of topics through time, this new interactive archive of Popular Science magazine is just the thing. With the help of a team at Google, the entire catalog of 1,563 Popular Science issues starting at the magazines inception in 1872 has been archived, creating a set of mineable data totaling 1.35-gigabytes. By using both a visual calendar and a circular animation of dates, users of the new Archive Explorer can see when words and terms were popular based on the number of times they appeared in that month issue. Especially interesting is observing when words like “internet” and “communist” came into use. Check it out for yourself at popsci.com.