On Friday, March 25, 2016 at 1:02:54 PM UTC-4, wrote:
"The European Space Agency recently announced plans for an international moon
base. The agency believes they could start building the complex in 20 years, with
different countries focusing on their areas of expertise."

See:

http://www.techinsider.io/esa-intern...-agency-2016-3

elon musk will have a mars base way before that.