Daniel and Katie touch on the explosive question of nuclear weapons and explain the impact of space-based explosions.

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Daniel and Jorge answer questions from listeners about the dangers of our Universe and whether engineers could save us. 

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Daniel talks to philosopher Thomas Barrett about whether there could be multiple effective descriptions of our Universe 

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Daniel and Jorge try to see through the mysteries of transparency.

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Daniel and Jorge talk about the super names for some of the most incredible events in astronomy.

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Daniel and Katie talk about the amazing physics, chemistry and biology that determines how we see the Sun.

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Daniel and Jorge talk about whether the Universe would make sense without antimatter.

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Daniel and Jorge talk about how clever experiments might provide a breakthrough in the effort to understand the quantum nature of space-time.

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Daniel and Kelly talk about how the gravitational dance of the Earth and Moon, and other objects in and out of our Solar System.

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Daniel and Jorge talk about how to use different cosmic rulers to measure the expansion of the Universe.

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