I just watched and thoroughly enjoyed Dinosaur 13.
It could be the title of a cheap sci-fi movie, it's not. Dinosaur 13 is a gripping, albeit biased, documentary that could rival many thrillers. It paints the story behind the South Dakota discovery of the largest T-Rex skeleton ever unearthed which, on the surface, sounds quite boring, but the David-vs-Goliath story of government overreach, bewildering courtroom drama and obsession that ensues is quite moving.
I suggest you just dive in without looking up the story, that's what I did.