Riddle #164

Question: It brings light to a dark dark world,
In a current it travels and through tunnels it's hurled.
Touch it and it'll kill you.

What is it?

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Question: What has a bed that you can't sleep in?

Question: What cannot be seen or felt, but can only be broken by voice?

Question: What tastes better than it smells?

Question: What goes in the water black and comes out red?