Rising Sea of Humanity: UN Says Pop. Will Hit 10B by 2100—& Keep Going Up

What's the News: The world's population is projected to reach 7 billion this October and continue climbing, reaching 10.1 billion by the end of the 21st century, says an official United Nations report (PDF) released earlier this week. This is a significant departure from earlier projections that said the population would peak at just over 9 billion, then level off and even slightly decline. How the Heck: