Old Dinosaur Theories

Don't act like you haven't changed your theories in some way shape or form over the years. We all have. Here's the theory I changed the most. My Old Theory: Before JP III was released, I was aware of Spinosaurus. Did I think much of it? No, not really. I just thought it was another large theropod. Then JP III was released. At the same time, I learned about Giganotosaurus. Suddenly, I thought there were two theropods that were bigger and badder than T-rex. I assumed that Spinosaurus was a 60 ft long, 12 ton killing machine that could beat a T-rex, Giganotosaurus was a 50 ft long, 10 ton monster from the South, and T-rex was, at 40-43 ft long and 5-6.5 tons, the biggest predator from the North(but smaller than Spino and Giga). That's right. I haven't always believed T-rex to be the biggest land predator ever. Changing My Theory: After a while, I realized that I can't just go off of what everyone else says. I have to do my own research and draw my own conclusions. After studying T-rex, Giga, and Spino more, I started thinking differently. I noticed how robust T-rex was compared to the other two(in my opinion). That's when I started thinking differently. My Current Theory: Now, I believe something very different from my old theory. i now place T-rex ahead of Spino and Giga at 40-50 ft long and 7-10 tons. I reduced Giga to 40-46 ft long and 7-8 tons or so, and Spino at 53-56 ft long and 5-7 tons(8 at the absolute most). I actually gave a much lighter estimate for Spino(4-6 tons), but I had recently revised this. Pharaoh of Africa [img]http://images.wikia.com/dino/images/5/56/00000000000000000000000000.jpg[/img] Lord of South America [img]http://images2.wikia.nocookie.net/__cb20130412191144/walkingwith/images/d/d3/Giganotosaurus.png[/img] King of Dinosaurs [img]http://netstorage.discovery.com/feeds/brightcove/asset-stills/dsc/125995785537712962900701197_102InfamousJaws.jpg[/img] So what are some of your old theories and how have they changed?