Daniel and Kelly answer a question about whether space can be infinite and finite

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Does the Universe go on forever, or have an end? What shape is it?

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Daniel and Jorge answer questions about moving planets, the Higgs field, and the future of particle physics.

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What could have caused the Big Bang, and what came before it?

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Daniel and Jorge talk about whether our galaxy is in the middle of a giant void that could have fooled us into thinking the expansion of the Universe is accelerating.

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How long can we enjoy the sunshine before we need a new star?

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Daniel and Jorge answer questions about galaxy collisions, black holes and Nitrogen!

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Why is gravity so much weaker than the other forces?

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