Why do metals of the same type stick together in space?

RisingSun361 · Jul 21, 2015

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...

Inside of a metal bottle cap on a terry cloth towel, with a printed label reading "Real Fact" #1003: If two pieces of the same type of metal touch in outer space, they will bond together permanently. Get all the "Real Facts" at snapple.com.

Orodruin · Jul 21, 2015

Likely a reference to cold welding.

Borek · Jul 21, 2015

Or to a Casimir effect.

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

Why do metals of the same type stick together in space?

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