Politicians won't get us back into the space race, but novelists just might.

The cofounder explains how he translated word-of-mouth recommendations into an online business.

Energy Secretary Steven Chu argues that incentives for private-sector innovators are key to achieving breakthroughs in energy efficiency.

How science can protect runners and cyclists as days grow shorter.

Tough to remember but easy to crack, passwords are the weak link in computer security. Billions hang in the balance.

Photomicrography captures the beauty of our world, up close.  

Seeking fortune and fame, entrepreneurs rushed to create programs for Apple's App Store. That's not always what they found.

The publishing conspiracy that's blocking an electronic version of Sarah Palin's memoir.

They're fast, fuel-efficient, and cleaner than ever. But will Americans really get behind diesel-powered cars?

A cheaper, greener way to deal with garbage.

Gmail's outage raises new concern about the Net's vulnerability.

The operating system upgrade costs only $29, but it's still probably not worth it.

Who could possibly be against homeowners using solar panels to power their homes? Utility companies.

...is as good as it gets for America.

The wind industry may be green, but it's proving deadly to wildlife.

T. Boone Pickens says he's still got the wind at his back and is ready to lead America toward energy independence.

Earth is being engulfed in a dense cloud of hazardous debris that won't stop growing.