When exactly did the Anthropocene begin? Trying to measure that is important to certain people. The answer according to certain of those certain people is 1950…

According to their calculations, human activity eclipsed the sun, Earth, and errant falling stars as the dominant process shaping life on this planet around 1950. “This coincides with things like the first nuclear bombs, which put traceable radiation in the atmosphere, which is visible in the sedimentary record,” says Gaffney. They aren’t the first to fix on the post-war period. The 1950s mark what many researchers call the Great Acceleration, when the booming middle class caused spikes in global GDP, agricultural land use, paper production, dam building, personal vehicle ownership, international tourism, and other markers of consumption. Steffen and Gaffney’s equation just adds more oomph to the argument that the Anthropocene began in the same era as color TVs.