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 Guru
Accepted answer and score of 40 or more. This badge can be awarded multiple times.

earned this badge 2 times.
Were the first sonic booms predicted?
Awarded Dec 26 '19 at 11:40
Did this “sledge rigged like a sloop” vehicle ever exist, or was it an invention of Jules Verne?
Awarded Dec 25 '19 at 23:20

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