Long dinosaur is long

Diplodocus is a sauropod — one of those dinosaurs whose shape you probably associate with the name "brontosaurus". Except that Diplodocus was long. Really long. At an average length of 90 feet, it's longest dinosaur ever found. Also: It might have had spines up and down its neck. Check out this LiveScience piece by Kim Ann Zimmermann for more fun Diplodocus facts.