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I'm white, and used for cutt...

I'm white, and used for cutting and grinding. When I'm damaged, humans usually remove me or fill me. For most animals I am a useful tool. What am I?

Correct answers: 61

The first user who solved this task is Fazil Hashim.

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When an escaped pris...

“When an escaped prisoner was caught camping out in the woods it was a clear case of criminal in tent.”

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Iron ship

In 1825, the first ship made in the U.S. with sheet iron was tested on the Susquehanna River. Named the Codorus, the vessel was built by Quaker John Elgar at York, Pa. using sheet iron fastened with iron rivets. The ship weighted five tons, of which two tons was for the coal- and wood- fueled boiler which provided power for an 8 h.p. engine. With a keel length of 60-ft and a 9-ft beam, the ship drew about seven inches of water. The next spring, the steamboat performed according to design by completing an upriver trip to Binghamton, N.Y. - the only steamboat to do so. The difficult three-month voyage proved that upstream navigation on the shallow, rock-filled Susquehanna was impractical.

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