Here, have fun.
"I guess it probably would have looked like a platypus on steroids."
T-Rex: Cool, but not the coolest. Nevertheless, here's a nifty infographic.
"Adventurers have stumbled across a cave so enormous that it has its own weather system, complete with wispy clouds and lingering fog inside vast caverns."
You might call them morons.
What have you guys been up to the last 200 million years?