Dinosaur Decline Started Long Before Asteroid Impact  

Laura Geggel LiveScience.com April 22, 2016 Artist’s illustration of asteroids headed toward Earth.More The dinosaurs — the so-called tyrants of the Mesozoic era — weren’t exactly thriving during their last few million years on Earth, a new study finds. The new analysis of the dinosaur family tree reveals that dinosaurs were disappearing even before the…