"Fundamental Forces", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License
Alt Text
"Of these four forces, there's one we don't really understand." "Is it the weak force or the strong--" "It's gravity."
"Fundamental Forces", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License
"Of these four forces, there's one we don't really understand." "Is it the weak force or the strong--" "It's gravity."