What is a black box anyway?

A Malaysian investigator takes a black box from Malaysia Airlines Flight 17 as it is handed over from Donetsk People's Republic officials to Malaysian representatives in the city of Donetsk, eastern Ukraine Tuesday, July 22, 2014. Bowing to international pressure Monday, pro-Moscow separatists released a train packed with bodies and handed over the black boxes from the downed Malaysia Airlines plane, four days after it plunged into rebel-held eastern Ukraine.

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    What is a black box anyway?

Everything you need to know about the boxes that are key to every plane crash investigation.