Therizinosaurus was a large theropod dinosaur from the Late Cretaceous of Mongolia, famous for claws that could reach around a metre long despite its plant eating habits. No real roar exists, so film and game sound designers invent its voice from deep animal calls. The species reached a wider audience after appearing in Jurassic World Dominion in 2022, which increased searches for its roar online. Short roar clips then spread through soundboards and video edits, where creators reuse them for any giant prehistoric creature needing an intimidating entrance.