Why are medium-sized predatory dinosaurs missing from the fossil record?

Where Are All the Medium-Sized Dinosaurs? · 11:40 · Video: PBS Eons · Watch at the source

In short: In ecosystems where giants like T. rex roamed, medium-sized predators are strangely absent from the fossil record. This video explores this ecological anomaly, contrasting ancient dinosaur populations with how modern ecosystems function.

The fossil record reveals a surprising scarcity of medium-sized predatory dinosaurs in regions dominated by massive predators such as Tyrannosaurus rex. This pattern is particularly puzzling because it contradicts the structure of modern ecosystems, where predators of varying sizes typically coexist.

The video examines this gap in the archaeological data, highlighting how the distribution of these ancient creatures defies standard ecological expectations. By analyzing these missing links, researchers continue to investigate the complex dynamics of prehistoric environments.

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