Scientists believe they have solved the mystery behind the extinction of dinosaurs

We knew that an asteroid heralded the end of the age of the dinosaurs. Now researchers say they have discovered a key element in their extinction

Related Keywords

Mexico ,North Dakota ,United States ,Belgium ,Belgian ,Mount Everest ,Philippe Claeys ,Louisiana State University Professor Cherly Harrison ,Nuclear Little Ice Age ,Voices Dispatches ,Yucatan Peninsula ,Nature Geoscience ,Little Ice Age ,