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Text: Gallery Interactives. Games and facts from our galleries. Illustrations: Silhouettes of animals, from our gallery icons.
Declining Diversity
Some fossil sites seem to show that as the extinction at the K-Pg boundary (formerly the K-T boundary) approached, the number of different dinosaur species was decreasing. The Hell Creek Site is a perfect site to test whether dinosaurs were already in decline before the K-Pg extinction. The fossils in each layer of rock give us a snapshot of life at that specific time.
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