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Why do metals bond in space?

  1. Jul 21, 2015 #1
    I was drinking a bottle of tea the other day, and I noticed the cap had a claim that two metals of the same type will stick together in space. Why is this?

    Edit: "Why" do metals....

  2. jcsd
  3. Jul 21, 2015 #2


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  4. Jul 21, 2015 #3


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    Staff: Mentor

    Or to a Casimir effect.

    Even if it doesn't require two pieces of the same metal, actually any two objects will do.
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