This ​is ​a ​Q ​and ​A ​edition ​of ​Space ​Nuts. We ​will ​be ​answering ​audience ​questions ​exclusively ​on ​this ​episode. ​We're ​looking ​at ​​a ​concept ​that ​Ross ​has ​put ​up ​about ​black ​holes ​equaling ​dark ​matter, ​we'll ​explain ​that. ​​Sandy ​is ​asking ​about ​navigation ​in ​space. ​​John ​is ​talking ​relativity, ​time, ​black ​holes ​and ​the ​big ​crunch. ​​And ​the ​speed ​of ​re ​entry ​is ​a ​question ​from ​Andy. ​We'll ​deal ​with ​all ​of ​that ​on ​this ​episode ​of ​space ​nuts.

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