this post was submitted on 30 Jul 2025
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Today I Learned (TIL)

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You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.

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The original was posted on /r/todayilearned by /u/LookAtThatBacon on 2025-07-30 18:31:38+00:00.

Original Title: TIL banks keep stacks of bills with dye packs next to a magnetic plate at a bank teller's workstation. It remains in standby mode until it's removed from the plate, causing it to become armed. A radio transmitter located at the door triggers an explosion that can reach temperatures of about 400 °F.

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