Photos: Ray Troll and the Helicoprion, or "buzz saw" shark

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A model of a Helicoprion, "buzz saw shark," by Gary Staabs at the Alaska SeaLife Center's "Summer of Sharks" exhibit.

The fossil of a bizarre shark with a "buzz saw" bite, found in the Brooks Range and lost for 29 years in the Smithsonian archives, is back in Alaska for an exhibit in Seward, thanks in part to the intervention of artist Ray Troll.

Read more: The mystery of Alaska's 'buzz saw' shark