Unfortunately, we should have explicitly said that, by all means, people should continue to answer e-mails within their areas of expertise, but we did not. It was never anyone's intention to muzzle anybody or restrict information from going out to the public.

We want to keep NASA front and center and capture the imagination of the viewer. And the Web is a good way to reach kids. In fact, it may be the best way.

NASA does a great job of communicating with people who are already predisposed to support portions of the agency's programs. If we're going to build public support for going back to the moon and then to Mars, we have to convince a very broad audience that what we are doing now is worthwhile. Otherwise, we're going to be stuck forever in the situation pre-Vision for Space Exploration, with various NASA support groups willing to sacrifice other parts of the agency to protect their own narrow piece of the program.

We'll be happy to talk to any others.

It's important, with climate change, landfills, hazardous waste, the health of humans and other species, future generations and the health of the planet.

I used to go to a lot of Harvard games and UNH is always one of the most competitive teams.