Found this web page posted on LinkedIn, and quite frankly, you can keep your robotics - I think itâ€™s amazing! This is a bridge which is 'grown' by directing the roots of a particular type of tree. Once the roots reach the other side of the gap, they are allowed to take root again in the earth. Over time, the bridges become stronger. Here's the original link http://forum.xcitefun.net/cherrapunji-wettest-place-on-earth-living-bridge-of-india-t35867.html Apparently it takes 10-15 years to 'build' but I'm curious - do you think this idea can be adapted for use in towns and cities. Imagine if a city infrastructure could be grown, not built!