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How many triangles?

Correct answers: 101

The first user who solved this task is Sanja Šabović.

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Heart surgery

In 1952, the first surgical operation in the U.S. to expose the heart's mitral valve for a prolonged time was undertaken by Dr Forest Dewey Dodrill at the Harper Hospital, Detroit, Mich. The patient, a 41-year-old man, was provided with The Michigan Heart as a substitute for the lower left ventricle.

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