In the universe things tend to cluster. This means there’s a coherent structure to the universe and learning about clusters of stars – galaxies - helps us figure out what that structure is. Join Chuck and Josh on an amazing space voyage!
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Selects: How Narcolepsy Works
52:41

Rope, yeah ROPE!
43:31

Short Stuff: Did a shipwreck double the size of the United States?
11:46