英语听力：恐龙之战之极限生存—19

　　Dinosaurs ruled the earth for millions of years. They grew to almost unimaginable sizes,nd adapted to extreme environments all over the globe.

　　These animals were very successful and really, some of the crowning achievements of evolution. And they do it all without much brain power.

　　Dinosaurs didn't need to solve quadratic equations. They didn't need to play chess. They didn't need to learn how to build rockets that go to the moon.What they needed to do was do the things dinosaurs do.

　　You really only need to be as smart, or smarter than the animals that you're around.

　　It's an animal that need to respond to threats because they have to guard their young, might need to be duty parents in many cases, might be able to find decent resources but, that is not saying to comprehend philosophy.

　　The armor dinosaurs in general and Ankylosaurus no exception here were no great dinosaurs.

　　They are like the dumbest dinosaurs ever lived. Their brains are really small for the size of their heads and their bodies.

　　Dinosaurs have just one job, to successfully operate the advanced machines their bodies have evolved into. And this is a job they do extremely well.

　　They would have seen and smelled and heard the world in ways that far exceed what we're able to do. And in a way, that's a lot of brain power,just a different kind of brain power.

　　For dinosaurs, brain power, carefully honed physical traits, and instinct all worked together. The result-- dinosaurs survive for over 165 million years, 800 times longer than we've been on the planet.

　　They were on this planet for more than 100 million years, and you know these guys were very successful and they only went out because of extraterrestrial causes.

　　It took a meteor to wipe out the dinosaurs, a testament to their incredible staying power. With their magnificent bodies and tiny brains, dinosaurs were success stories like no other creatures the planet had seen before or since, including the human race.