What the hell is Invar?
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What the hell is Invar, shortened as WTH is Invar, is a joke made by Beetrolled posted on Youtube, titled "the invar incident (sevtech ages)". The video takes place on CraftEevee350's Modded Serber with the Sevtech Ages mod, which includes invar as a metal. The video begins with Beetrolled accidentally crafting invar when melting iron and nickel, which leads to him be confused and saying the following line, "What the, what the hell is Invar?"