OK I'll be honest, I have seen bits and pieces of the first Thor movie.  I watched The Avengers, but haven't seen the second Thor movie.  Don't get me wrong, Chris Hemsworth is a great actor and easy on the eyes, but since my son isn't a huge Thor fan we just haven't watched the movies.  However, I do find that it is fun to learn about things like Thor's hammer.  Here's the answer to the question, how much does Thor's Hammer weigh?