Today marks another milestone in the march of the Anthropocene. According to United Nations demographers, the seven billionth person on Earth arrived today, just in time to put on a tiny halloween costume (might we suggest an adorably endangered tuna?). It's taken just 12 years to add the last billion people, and even with slowing birth rates, it will still take us only 14 years to add another billion more. What does the burgeoning population of Homo sapiens mean for our overloaded planet? Learn more about the global effects of the Anthropocene here and here. If you're in the Amsterdam area on November 5th, Christian Schwägerl will be giving a talk on the "Age of Man" at the Next Nature Power Show. Image via Looking to Business.