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The Random Thought Megathread

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I do not understand how fish can run out of oxygen in a fish tank. Wouldn't all the water dry up first?
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Dissolved oxygen
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You can't tell by looking at water that there is oxygen in it (unless you remember that chemical makeup of a water molecule is hydrogen and oxygen). But, if you look at a closed bottle of a soft drink, you don't see the carbon dioxide dissolved in that - until you shake it up and open the top. The oxygen dissolved in lakes, rivers, and oceans is crucial for the organisms and creatures living in it. As the amount of dissolved oxygen drops below normal levels in water bodies, the water quality is harmed and creatures begin to die off. Indeed, a water body can "die", a process calledInvalid Link Removed."
 
Please have your tickets ready.
I'm sorry Sir, but your ticket was only valid up to Notting Hill Gate. You have passed your validity zone by two stations.
I'm going to have to ask you to come with us, please.
Please Sir, don't make a fuss, and don't cry. Your wife and employer will be made aware of your whereabouts,within the allotted time limit.
 
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