Cash from the crowd

Massimo G. Colombo, Chiara Franzoni, Cristina Rossi-Lamastra

Science  12 Jun 2015:
Vol. 348, Issue 6240, pp. 1201-1202
DOI: 10.1126/science.aab3832

Full paper: http://science.sciencemag.org/content/348/6240/1201