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Explore Wonders | Find: 北卡罗来纳州立大学艺术文凭证书（证件网:ｚｊｗ２１１.ｃｏｍ)崇左办个安哥拉驾照-办假的日本健康科学大学文凭毕业证[办证网:ｚｊｗ２１１.ｃｏｍ]办工商银行ATM机存款凭条Rw | Wonderopolis

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Where Does Old Money Go?

Today’s Wonder of the Day takes a look at what happens to old, dirty bills!

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Where Does Old Money Go?
How Are Dolphins and Porpoises Different?

Today’s Wonder of the Day may seem a little fishy! But that’s OK — we made it that way on porpoise!

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How Are Dolphins and Porpoises Different?