When the dinosaurs died, so did forests-and tree-dwelling birds
(PHYSorg.com Archaeology & Fossils)

Sixty-six million years ago, the world burned. An asteroid crashed to Earth with a force one million times larger than the largest atomic bomb, causing the extinction of the dinosaurs. But dinosaurs weren`t the only ones that got hit hard-in a new study, scientists learned that the planet`s forests were decimated, leading to the extinction of tree-dwelling birds.