Bubble Chamber Trajectories: This frame of photographic film (mounted and distributed by @boxofmatter) captures a rare glimpse of exotic subatomic processes that were unleashed within Fermilab’s 15-Foot Bubble Chamber. Built in the early 1970s, this colossal detector was a marvel of particle physics, filled with liquid hydrogen (at -253 C, only 20 degrees above 0 Kelvin) poised on the edge of boiling by displacement of a giant piston in 1/60th of a second which superheated the entire 380 thousan