What is cold welding?

Exploring the concept of cold welding, how it merges metals without heat, and its potential applications in space. Delving into the history of welding, from blacksmithing to modern techniques. Discussing the atomic interactions in cold welding and its implications for non-metal materials. Highlighting the challenges of achieving cold welding in complex materials and space environments, with anecdotes from Soviet spacewalks and the Galileo probe. Emphasizing the role of cold welding in creating near-perfect bonds in nano scale fabrication and its impact on space engineering.