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In regards to dolphin’s echo location, how do they see and interact with people on the opposite side of aquarium glass? Do they have excellent eye sight on top of their echo location?

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In regards to dolphin’s echo location, how do they see and interact with people on the opposite side of aquarium glass? Do they have excellent eye sight on top of their echo location?	1
How long is it until Universal Heat Death and would it be possible to replace dying stars with reliable synthetic versions before it’s too late?	1