In a recent TED Talk photographer Edward Burtynsky follows the path of oil through modern society, highlighting where it came from, how we use it, and whether we can live without it. The stunning pictures that accompany his presentation provide a glimpse into this life-changing substance and the challenges associated with it.

You may remember we featured a link to a TED Talk by William Kamkwamba earlier this fall. TED videos are a great way to explore cutting edge concepts and experience thought-provoking presentations by experts all over the world. For more, visit www.TED.com.

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