A simple, cheap device turns sunlight into hydrogen fuel.
Professional athletes are getting injections of stem cells to speed up recovery from injury. Critics call it a high-tech placebo.
Apple is using a combination of solar, fuel cells, and renewable energy purchases to meet its clean-energy targets.
Tapping huge reservoirs of brackish water could make desalination far more practical.
Millions of batteries discarded with computers have more than enough life to power home lighting for one year, researchers in India say.
The inside (sort of) story of why Apple’s industrial-design machine has been so successful.
A new material that requires no electricity uses the universe as a heat sink—even when the sun is shining.
An app called MeshMe lets you communicate without a cellular or Wi-Fi connection, providing enough other users are close by.