3. In Space, If Two Pieces Of The Same Type Of Metal Touch, They Will Bond Permanently.
In a vacuum like space, when two pieces of metal touch each other they bond together. This amazing process is called cold welding. On Earth, obviously because of the air and water in our environment separating the pieces this does not happen naturally but it is used during some manufacturing processes. It is something to take into account but it is not usually a problem as the astronaut’s tools and spacecrafts maintain an oxide layer even when leaving Earth.