For Northland high school students, it's a test of the trusses
Sierra Offersen was quick to answer when asked how long it took her to build her elegant toothpick bridge.
"Thirty hours," the ninth-grader from Hermantown said.
It was easy to calculate because that's how many episodes of the television show "Supernatural" she watched at home while gluing hundreds of toothpicks into the form of her bridge.
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