How many moons does the Earth have?

How many moons does the Earth have?

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How fast are we moving?

Daniel and Kelly slow down to understand what velocity really means, and how much we have of it.See omnystudio.com/listener for privacy information. 

Can quantum measurements change the past?

Daniel and Kelly talk about the problem of time in quantum mechanics and how the past might depend on the future.See omnystudio.com/listener for privacy information. 

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