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TIL A theater's air composition varies depending on what kind of scene is playing. A study showed that the strongest collective chemical response was for suspense and comedy sequences. Understanding the change in the air's chemistry in theaters can help us develop cancer detection techniques.

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VBd0G TIL that a genetic disease might have been behind Henry VIII’s low number of surviving children and his crazed behavior in his middle and later years.
P1gPZ TIL that not only did Barbie creator Ruth Handler name Barbie after her daughter Barbara, but she then named Ken after her son Kenneth.
v1Kk7 TIL Beats headphones, which originally retailed for $199 back in 2013, cost about $19 to manufacture. The speakers themselves cost just $1.80 to produce. There's so few parts in the actual headphones, they inserted metal pieces just to make them heavier and feel more substantial.
Z8aev TIL Tommy Lee Jones Really Hated Working With Jim Carrey while filming Batman Forever. Jim Carrey said hello to him during the set and Tommy Lee's response was "'I hate you. I really don't like you... I cannot sanction your buffoonery!"
byr7 TIL if you are an alcoholic at an airport, and feel tempted to head to one of the bars, instead have “Bill W.” paged over the loudspeaker. This is an AA code known by its members; if another AA member hears the page, he/she will come meet you and help you stay away from the bar.