Many natural processes, from evolution to continental drift, happen so slowly that it took humans millennia to realize they were happening at all. By those standards, the global climate is changing quite rapidly — the average global temperature has risen about 1.4 degrees Fahrenheit since 1880, according to NASA’s Goddard Institute for Space Studies. But people remain more focused on short-term weather events, which affect their lives immediately, than long-run climate trends.

But load more than six decades’ worth of temperature data into a