U.S. temps in June 2013 were 2 degrees above 20th Century average. U.S. West was fighting wildfires while the U.S. East saw below average temps and rain, rain, rain.
An asteroid impact caused the extinction of most dinosaurs and half of ocean-dwelling species. Meanwhile, life in inland freshwater ecosystems largely survived. Why?
The United Nations says global human population reached 7.2 billion in mid-2013. The "medium-fertility" projection for the year 2050 has been revised upward to 9.6 billion.