"LED Street Lights, Saw Blades, Coffee and Opalescent Glass"
Date Aired:
Feb 24, 2010
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Find out how to build a street light that burns for 30 years without ever changing a bulb, how do they put the bite into a circular saw blade, when should a coffee bean crackle like popcorn, and how is a pile of powder transformed to help you see the light in opalescent glass?