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.
Typhoon Soulik is hitting parts of Taiwan today. It'll continue to push northwest and affect parts of China's provinces of Fujian and Zhejiang on Saturday.