Featured in April 2012
Gray Matter: Want a Chemical Reaction Without Heat? Add a Catalyst
How does this copper earring glow without any flame or current?
A Model Disaster
Have engineers learned anything from the loss of the unsinkable Titanic? Will they ever?
The Goods: April 2012’s Hottest Gadgets
A dozen great ideas in gear
The Thousand-Year-Old Viking Sunstone
A thousand years ago, Vikings navigated with a sunstone, which they used to locate the sun on cloudy days. The...
You Built What?!: A Street-Legal Three-Wheeler That Runs on Nearly 2,000 Batteries
The Canadian Road Hawk
Interface The Music: An Introduction to Electronic Instrument Control
An introduction to electronic instrument control
Invention of The Month: Conductive Ink
Don’t wire a circuit—doodle it. To connect batteries to devices such as resistors and LEDs, a newly developed ballpoint pen...
The Internet Goes Local
The path to a better internet begins with engineers rethinking its networks. It might be the only way to keep it free
Rec-Room Cockpit: How One Reader Built His Own Flight Simulator
Clint Fishburne, a regional-airline pilot based in Atlanta, wanted to help his children develop the body movement and muscle memory...
Simple Project of the Month: Build Your Own Hoverpuck
Love air hockey, but find the tabletop version a little confining? How about busting out the concept of a fan-powered...