Karl contemplates how many different species are actually needed in the world, and whether or not we should keep looking for new forms of life. Karl questions if inventions like modern vacuum cleaners and toasters are necessary.

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(creator: the original audio book series), (creator: the original audio book series) | 1 more credit »
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Karl contemplates how many different species are actually needed in the world, and whether or not we should keep looking for new forms of life. Karl questions if inventions like modern vacuum cleaners and toasters are necessary.

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Release Date:

18 March 2011 (USA)  »

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16:9 HD
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Connections

References Blue Peter (1958) See more »

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