147 teams will compete for $5 million in the IBM Watson AI XPrize

The XPrize program is no stranger to moon shots. From capturing carbon to cleaning water -- even literal trips to the moon and Star Trek-style tricorders -- the contest seeks the boldest solutions to humanity's greatest challenges. That tradition continues in the company's latest competition, the IBM Watson AI XPrize, in which 147 teams from 22 countries will compete for a $5 million purse over the next four years. The AI competition will be the first such XPrize that is "open" in that teams will be free to solve any issue they want. There will be a number of "domains" (read: themes) that they can choose from including Health and Wellness, Civil Society, Space and Exploration or Energy and Resources, but so long as the competitors solve their problems using AI, their projects can straddle any or all of these domains.