
By Regan Morris BBC News, Los Angeles
"We know that there's water on the Moon, which is a game-changer for the solar system. Water is rocket fuel. It also can support life and agriculture. So exploring the Moon commercially is a first step towards making the Moon part of our world, what humanity considers our world," says Bob Richards, CEO of Silicon Valley-based Moon Express, one of 25 companies racing to win the $30m in Google Lunar X Prizes.
It is considered to be among the top-three teams in the running for the prize. The other two are Pittsburgh-based Astrobiotic and Barcelona Moon Team.
Google's $20m first prize will be awarded to the first privately funded company to land a robot on the Moon that successfully explores the surface by moving at least 500m and sends high-definition video back to Earth.
A second place team stands to win $5m for completing the same mission, with bonus prizes for teams that travel more than 5km or find water. The deadline is 2015.