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Invertebrate Evolution Marine Mammals Early Life Cambrian Period Molluscan Ancestors Canids Vocalization Evolution Whale Evolution Unicellular Organisms Multicellular Life Tooth Evolution Cephalopod Evolution Coloration Patterns Predatory Behavior Multicellular Organisms Tetrapod Evolution Ctenophora Molluscan Evolution Canis Familiaris Adaptation Size Evolution Arthropod Evolution Gigantism
A peer‑reviewed study says modern imaging and cross‑collection comparison show a semi‑aquatic predator reached huge size long before forests reshaped land ecosystems.
