My friend Andrew linked me to this nifty old-timey video showing London, Midland, and Scottish Railway employees repairing a steam locomotive. There's a lot of neat stuff happening here, but I particularly loved the part where a guy crawls backwards into the train's firebox to diagnose boiler and engine problems from the inside. TRAINS!
Gentleman crawls into boiler of steam locomotive
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.