Only movie stars and select consumers have been able to get their hands on hydrogen fuel cell vehicles in the United States over the past few years, but now these zero-emissions cars are poised to bust onto the scene in a big way around 2015 to 2017. Go to story #1

MONTEREY, Calif. -- One hundred twenty-five scientists met in Paris in 2004 for the first major global meeting on ocean acidification. This week, more than 540 are gathered here in Monterey to hear about the latest research in this rapidly expanding field -- so many that conference organizers warned there were more attendees than seats in the main auditorium. Go to story #2