THE PRESENT: Paleontologists excavating the bones of a juvenile Tyrannosaurus rex unearth modern human skeletons and a piece from an aircraft’s tail, stripped of all identifying markings, buried in the Cretaceous terrain. Scientists from both paleontology and crash investigation realize that their rigid academic beliefs may be shattered by what else they will soon discover.

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THE PAST: Several people board an airplane in Portland, Oregon, headed to Atlanta. When the plane encounters unusual turbulence, the competent pilot must land the aircraft without instruments, running out of fuel, in an unfamiliar world. The crew and passengers slowly come to realize they have landed in the distant past. As the survivors explore their new world, expecting to be rescued, they must fight against T. rexes and other threats from this previous era.

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