Steps of terror
In 2011, a local hunting guide happened upon a tyrannosaur footprint in the Canadian wilderness.
Excavating tracks
When researchers began excavating, they found a long, skinny stretch filled with dinosaur tracks of several types, including several more tyrannosaur tracks.
Molding the feet
Researchers created moldings of the footprints to study them in more detail.
Pack animals?
The three sets of tyrannosaur tracks were parallel to one another and all the same depth, suggesting the fierce predators moved together.
Pack animals?
The tracks strengthen the theory that tyrannosaurs were pack animals.
Theropod track
Tyrannosaurs weren't the only animals to have left their mark. Smaller theropods also left prints in the area.
Hadrosaur print
The tyrannosaurs narrowly missed their prey, as revealed by a track made by a hadrosaur that came through after the tyrannosaurs.
Hadrosaur skin
The hadrosaur also left a skin imprint in one of its tracks.
Recreating the walk
The footprints allowed researchers to recreate the tyrannosaurs' walk.
Walk on
The tyrannosaur tracks were all created at the same time, suggesting the terrifying trio may have stalked prey together.
