The Conservation of Energy Is a Principle Worth Honoring. Let’s Start by Installing Triple-Pane Windows

By Vaclav Smil Illustration: Harry Campbell The lust for untested technological fixes is the curse of energy policy. Take your pick: self-driving solar-­powered cars, inherently safe nuclear minireactors, or genetically enhanced photosynthesis. Why not start with what is proven? Why not simply reduce the demand for energy, beginning with [ …

Draw Biosensors on Your Skin

By Charles Choi Photo: University of California, San Diego Someday soon, on-demand diagnostics could be as simple as doodling on your arm or leg. Special sensor-laden inks would help diabetics monitor their blood sugar and allow people to stay on top of other elements of their body chemistry. The write-once, …

The Power Suit of the Future

By Charles Q. Choi Illustration: Sungkyunkwan University A flexible, durable cloth that generates power from the same effect behind most static electricity could harvest energy from human motion to power wearable gadgets, researchers in Korea and Australia say. Wearable devices such as the soon-to-drop Apple Watch are growing increasingly popular, …