FEATURES

FEATURE ARTICLES:
The Double Life of ATP in Humans
By: Baljit S. Khakh
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

FEATURE ARTICLES:
What Undersea Vents Reveal about Life's Origins
By: Alexander S. Bradley
Analyses of a recently discovered type of hot vent ecosystem on the seafloor suggest new possibilities for how life evolved

FEATURE ARTICLES:
Arctic Climate Threat--Methane from Thawing Permafrost
By: Katey Walter Anthony
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?

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

FEATURE ARTICLES:
Portrait of a Black Hole
By: Avery E. Broderick
By adapting a global network of telescopes, astronomers will soon get their first look ever at the dark silhouette of a black hole

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

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