Yep, I knew that was coming....
http://paleo.cc/paluxy/mantrack.htm
"The most thorough analyses indicate that the alleged human tracks here are elongate, metatarsal dinosaur tracks--made by dinosaurs that, at least at times, impressed their soles and heels as they walked (Kuban, 1986a, 1986b; Hastings, 1988)"
By the way, want to find an actual cite to that "human skulls in Pliocene" "evidence", other than a vague reference to it on a creationist website?
I'll go with the scientists who I believe. You can believe as you wish.