Post date: Sep 15, 2016 1:50:3 PM
https://en.wikipedia.org/wiki/Heliotropism
http://www.nytimes.com/2016/06/17/arts/design/christos-newest-project-walking-on-water.html?_r=0
http://www.csiro.au/en/Research/MF/Areas/Innovation/Biomimetic-Physics