Imagine a electroneutral substance, a fluid with standard conditions. Filled with "free" neutrons to the hat.

submitted by [deleted] from self.Physics

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[–]IkeConn 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (1 child)

Sounds like heavy water.

[–][deleted] 2 insightful - 2 fun2 insightful - 1 fun3 insightful - 2 fun -  (0 children)

blup.