A teacher spotted two unusually large footprints. They turned out to be a first for scienceScienceSep 23 at 2:56 PM – Sep 23 at 11:00 PM3 outletsCNNFirst T. rex trackway discovered in North Dakota by high school science teacher seen Sep 23 at 2:56 PMCTV NewsA teacher spotted two unusually large footprints. They turned out to be a first for science seen Sep 23 at 6:56 PMRNZA teacher spotted two unusually large footprints. They turned out to be a first for science seen Sep 23 at 11:00 PM