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[narrator] The amount of
uranium needed to create a chain reaction is
called the critical mass
uranium needed to create a chain reaction is
called the critical mass
Full Transcript
00:00:01.000 --> 00:00:02.888
[narrator] The amount of
uranium needed to create
00:00:02.922 --> 00:00:06.027
a chain reaction is
called the critical mass.
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Movie Summary
From a piece of meteorite found in Tutankhamun's tomb to the Crown of Thorns, explore some of the most perplexing and unusual objects lying hidden away in museums, laboratories and storage rooms.