Termite mounds amaze me. How can tiny creatures with no way to see the big picture build strong giant structures?
A team at Harvard University have made robots that follow simple instructions to build big structures as a team. The cool thing is that individual robots don't know what the finished structure will be. They just react to what's around them and keep on building. More advanced versions could be used to build flood defences such as sandbag walls. Robots to the rescue!
This research appears in the 14 February 2014 issue of Science, the journal of AAAS, the non-profit society.