Alex Dobrianski, left, sitting for a photograph with his son Sergei Dobrianski, holds a model of the structure of their proposed entry in the Google Lunar X competition, in Vancouver, B.C., on Wednesday January 18, 2017. Alex Dobrianski, left, sitting for a photograph with his son Sergei Dobrianski, holds a model of the structure of their proposed entry in the Google Lunar X competition, in Vancouver, B.C., on Wednesday January 18, 2017.