Transcript
AUDIE CORNISH, HOST:
And now, 4,000 years of economic growth in seven minutes. This story comes, of course, from our Planet Money team. David Kestenbaum and Jacob Goldstein bring us the history of light and how the world came what it is today.
DAVID KESTENBAUM, BYLINE: Before you could get light at the flick of a switch, there were other options - none of them very good. Jane Brox wrote a book called "Brilliant: The Evolution Of Artificial Light." In the tropics, she says, people would catch fireflies and make a sort of firefly lantern.