
Neil deGrasse Tyson @neiltyson
In 1991 Marvel introduced a Thor’s Hammer trading card declaring Mjölnir to be made of the Asgardian metal Uru, weighing 42.3 lbs — but they didn’t specify where in the universe. That weight on the Mars moon Deimos, for example, corresponds to 140,000 pounds on Earth. https://t.co/v984LzCJYr — PolitiTweet.org