jtbell
Staff Emeritus
Science Advisor
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The prop department goofed in tonight's show... Sheldon was reading the American Journal of Physics instead of something like the Physical Review. Maybe they thought the yellow cover went better with the red armchair he was sitting in. 
(for those not in the know, AJP covers teaching-related topics, whereas PR is a "real research" journal.)

(for those not in the know, AJP covers teaching-related topics, whereas PR is a "real research" journal.)