4.29 avg rating — 1,077,328 ratings

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4.13 avg rating — 1,840 ratings

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4.40 avg rating — 78,986 ratings

"Questioning the nature of reality."

4.21 avg rating — 216,906 ratings

"Because life is like this."

4.27 avg rating — 19,470 ratings

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4.30 avg rating — 7,815 ratings

"I need to know the nature of the universe."

4.39 avg rating — 385,463 ratings