Photo: Happy Birthday solar cells! Bell Labs unveiled the first solar cell 60 years ago today.

http://gizmodo.com/60-years-ago-today-bell-labs-unveiled-the-solar-cell-1567543841
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Happy Birthday solar cells! Bell Labs unveiled the first solar cell 60 years ago today.

http://gizmodo.com/60-years-ago-today-bell-labs-unveiled-the-solar-cell-1567543841

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