Problem: Central to Norse mythology, Yggdrasil is a huge what, connected to the cosmos?
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A: tree

Problem: William Oughred invented which mathematical instrument in 1622?
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A: slide rule

Problem: What nationality was the explorer and navigator Vitus Bering?
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A: danish

Problem: "Which scientist and inventor became known as the ""Wizard of Menlo Park""?"
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A:
thomas edison