
The No-Money-Down Solar Plan
A new wave of start-ups wants to install rooftop solar panels on your house. Upfront cost: nothing

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The No-Money-Down Solar Plan
A new wave of start-ups wants to install rooftop solar panels on your house. Upfront cost: nothing

Delivering the U.S. from Oil
Plug-in hybrid trucks are improving the long view of the short haul

Bus Rapid Transit
Subwaylike bus lines mobilize the urban future

Ocean Overhaul
Marine zoning is a bold remedy for sick seas

More Ideas to Watch

The Power of Garbage
Trapped lightning could help zap trash and generate electricity

The Omnipotence Machines
Tiny, ubiquitous sensors will allow us to index the physical world the way the Web maps cyberspace

The Do-Anything Robot
Your PC can accomplish any computing task you ask of it. Why isn't the same true for robots?

Pocket Translator
The military, short on linguists, is building smart phone–based devices to do the job

Know if Disease Grows Inside You
Complex diseases have complex causes. Luckily, they also leave a multitude of traces

Satellites Diagnose Disease Outbreaks
Space-based data are helping to track and predict the spread of deadly diseases

Illuminating the Lilliputian: 10 Bioscapes Photo Contest Winners Revealed
A gallery of images captured by light microscopy reveals the high art of the natural world

The Double Life of ATP in Humans
The molecule ATP, famous as an essential energy source inside cells, also carries critical messages between cells. That dual role is suggesting fresh ideas for fighting human diseases

World Changing Ideas: 20 Ways to Build a Cleaner, Healthier, Smarter World
From solar power to powering our planet with garbage, Scientific American explores ideas that would improve our planet

Portrait of a Black Hole
By adapting a global network of telescopes, astronomers will soon get their first look ever at the dark silhouette of a black hole

Decoding an Ancient Computer: Greek Technology Tracked the Heavens
New explorations have revealed how the Antikythera mechanism modeled lunar motion and predicted eclipses, among other sophisticated tricks

Arctic Climate Threat--Methane from Thawing Permafrost
Arctic permafrost is already thawing, creating lakes that emit methane. The heat-trapping gas could dramatically accelerate global warming. How big is the threat? What can be done?

What Undersea Vents Reveal about Life's Origins
Analyses of a recently discovered type of hot vent ecosystem on the seafloor suggest new possibilities for how life evolved