For any of you who think me stupid due to my social awkwardness, I am about to explain the science behind Mjölnir, Thor’s hammer. I have not copied this or used the notes of another to compile this theory. It is based upon my own observations alone. Okay, here we go.
Mjölnir (Pro: M-Yole-Near), is an ionic energy battery, capable of expelling surplus energy. It is also a self-sufficient gravity-field generator.
Ionic Energy Battery
Ions are the atomic charges responsible for creating and carrying lighting. As a battery, it has the ability to absorb and store ions and use them to generate large amounts of electricity in the form of lightning bolts and energy fields, which can either impact or protect. The hand grip insulates it from the hand of the wielder. Direct physical contact with such energy could seriously harm even an Asgardian.
The reason Mjölnir can only be wielded by Thor is because it’s keyed to his DNA. When someone else tries to lift it, it increases its own center of gravity to assure it cannot be moved, even a single unit of space, giving it the appearance of infinite weight. In the film, when he could no longer lift it, it no longer recognized Thor as it’s owner. He might as well have been a small child trying to move the world. This gravity-field is also which allows the hammer to come to Thor upon command and allows Thor to achieve flight.
Despite the strong mythical undertones of Mjölnir, theoretically, it could possibly be created. The science is sound. All we lack is a metal capable of retaining such power without over-heating and melting. Such a metal might have to be artificially created. Also, the cost would be potentially astronomical.