ARPA-e Summit Reveals U.S. Energy Future

[caption id="attachment_11053" align="alignleft" width="385" caption="Bill Gates and Steven Chu have a "fireside" chat at the 2012 ARPA-e summit. Courtesy of Department of Energy."] [/caption]The future of energy will be on display at the fourth annual summit of the Advanced Research Projects Agency for Energy , or ARPA-e . But which future? [More]