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You answered "Oyster". Click "CONTINUE" to proceed to the next question.
Interesting fact:
Science can be quite crazy: There is a hypothesis that all electrons in the universe are actually the exact same particle that is moving forwards and backwards through time! Aptly called the "One-electron Universe Postulate", it further suggests that when the electron moves backwards, it becomes the positron, or rather, all positrons.
Fact Lab
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