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  1. 🤔 Deep Dive Podcast: What If? 2 by Randall Munroe 🚀

    🤔 Deep Dive Podcast: What If? 2 by Randall Munroe 🚀

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  2. What if we aimed the Hubble Telescope at Earth?

    What if we aimed the Hubble Telescope at Earth?

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  3. Would a Submarine Work as a Spaceship？

    Would a Submarine Work as a Spaceship？

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