The Dinosaurs Are Almost Always Found on Their Backs

There is a type of dinosar which is almost always found on its back. 70% of them are found upside down, more than other dinosaurs. The conclusion is that they got swept out to sea and then turned upside down because the gas in their bellies was lighter,. That way they stayed upside down, and then they became fossilized. And other animals don't do that. So that's the difference.