Renewable energy also rocketed towards a more sustainable tomorrow as Japan's team Tokai took first place in the World Solar Challenge and Apple filed a set of patents for next-generation solar technology. Meanwhile Facebook announced plans to launch a new energy efficiency app in 2012 and we launched a contest where you can win one of 25 $600 home energy audits. We also showcased a stunning set of satellite photos of the world's power lines, and since Halloween is on its way, we brought you a Zombie-Powered Vertical Farm designed to keep its inhabitants safe from the Living Dead.
Speaking of Halloween, this week we shared instructions for making a DIY cardboard box robot costume, and we launched our 2011 Green Halloween Costume Contest for kids. We also brought you several developments from the realm of eco textiles -- a material that repairs its own rips and tears and a Japanese company that recycles old bras into power-generating fuel. Finally, we showcased several slick developments in aqueous technology: an oil skimmer that cleans up spills four times faster, an artificial muscle that could one day propel nanobots through the body, and a quirky set of 'Macquariums' made from Apple iMacs.