LARAMIE, Wyoming: It's a Jurassic curiosity: As far as anyone can tell, the fossilized, three-toed dinosaur tracks in north-central Wyoming and on Scotland's coast are indistinguishable.

Even after painstaking measurements and statistical analysis, University of Glasgow paleontologist Neil Clark can't identify any differences between the two sets of 170 million-year-old tracks.

"The fact that the footprints in Wyoming and the ones in Scotland are so similar suggest that they may have been produced by a very similar kind of dinosaur, if not the same species," he said during a recent phone interview from his home in Glasgow, Scotland.