It's possible for two pieces of the same metal to actually fus | 💫Best Astronomy pictures /astroknowledge /spacefacts channel 💫
It's possible for two pieces of the same metal to actually fuse together if they touch in outer space.
This is known as "cold welding", and it occurs because the atoms of both individual bits do not know that they belong to different pieces of metal, so they join together. This doesn't happen on Earth because there is always air or water separating the pieces.
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