Thor is powerful, but when he went up against the Marvel Universe's greatest weapon, he was taken down effortlessly, Mjolnir ...

Here to explain more about one particular aspect — Thor's hammer and new weapon — is USC Professor of Physics and a Marvel movies science advisor, Clifford Johnson. You can also check out ...

In the end, Odin returns Mjolnir to Thor and forges for Bill a new weapon made out of the same material. Its name: Stormbreaker. The weapon never actually belonged to Thor. It does now in the ...