In the ongoing campaign to protect endangered animals, forensic investigators can already identify the food on your plate. Now they are working on advanced methods of intercepting even the most carefully disguised contraband - be it tuna, caviar or bushmeat. Their ultimate goal: pinpoint where the goods came from, and stop the hunting of endangered species at the source.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.