Aol News: Was it long-term climate change, rather than a rogue asteroid, that killed off the dinosaurs? That’s the conclusion of German paleontologist Michael Prauss, who studied 65-million-year-old fossils drilled out of the earth in the Brazos River area of Texas and argues that radical changes to the flora and fauna of the era began long before arrival of the massive space rock widely associated with one of the largest mass extinctions in the history of the planet. That impact, at …