Neil deGrasse Tyson just took the mystery out of a cosmic mystery in comics, and somehow made it even cooler. How much does Mjolnir, the hammer of Thor and forged from a collapsing star, actually weigh? Turns out, stars weigh a lot.
And then, naturally, he got his hands on the real thing.
Anyone want to bang out the maths on Cap's shield on a napkin while we're at it? [Twitter]