Your Favorite Dinosaur Theories

Your Favorite Dinosaur Theories Being that dinosaurs are extinct, almost everything we know about them comes from fossil record and that actually tells us surprisingly little about their habits in life. Scientists theorize at least 90% of what we "know" about dinosaurs and less than 5% of all dinosaurs to exist have been found. There was likely an undiscovered theropod bigger than Spinosaurus, there likely was a theropod with a higher bite force than Tyrannosaurus (possibly Torvosaurus), there was likely a dinosaur smarter than Troodon and there was likely a dromaeosaur bigger than Utahraptor. Some popular theories are about "synonymous species" like the possibility that Nanotyrannus was a juvenile Tyrannosaurus, or Torosaurus being the adult form of Triceratops with Nedoceratops as a transitional form and there's even another theory that suggests Nedoceratops was a hybrid between the two. [img]http://1.bp.blogspot.com/_RVVUU2V2j2k/TT-cCPtrF8I/AAAAAAAAAiA/i0-ysli-0bs/s320/trike_growth.jpg[/img] One theory I really like is the "grizzly bear" Spinosaurus theory. It would suggest that Spinosaurus had a hump instead of a sail like a grizzly and walked quadrupedally. This is supported by their very similar arm to leg and body proportions and claws as well as their diet and very robust weight carrying bones. This would mean that Spinosaurus could charge very fast like a grizzly and would likely also have several other features of a grizzly. It would also explain how it got so big because an animal 60 feet long is unlikely to be bipedal because of Cope's rule, which states that there is a limit to how big you can get when walking on two legs before gravity gets the best of you which would have been around 10-13 tons and 45-50 feet, which either meant Spinosaurus was impossibly lightly built (like a Troodon) or it was quadrupedal. [img]https://lh4.googleusercontent.com/-3D-1Ie28MN8/UfCYQ-ascNI/AAAAAAAAADg/LZ95Zu_liB8/s640/blogger-image-1933283917.jpg[/img] [img]https://lh6.googleusercontent.com/-oTFRj98mTNI/UfCYRm_ntwI/AAAAAAAAADo/9J32SZECapY/s640/blogger-image-341428148.jpg[/img] What's your favorite theory?