Dinosaurs didn’t roar the way Hollywood likes to pretend. Their voices were stranger, more guttural, closer to foghorns, booms, and goose calls than cinematic screeches. Now, an art project is trying to bring those sounds back to life with instruments modeled after actual fossils.

The work, titled Dinosaur Choir, is a collaboration between artist and musician Courtney Brown and designer Cezary Gajewski. Their lineup begins with Corythosaurus, the duck-billed dinosaur whose strange headgear doubled as an acoustic system. Air moving through its hollow crest probably produced sounds closer to brass notes than roars.

Using CT scans, the team 3D-printed the crest and outfitted it with electronics to mimic how air might have moved through the dinosaur’s head. The sound that came out was deep a

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