How the year's most promising technologists are chosen, and why we insist on their youth.
An improved catalyst could lead to cheaper ways of producing hydrogen from water
Gas-filled microspheres quickly reverse oxygen deprivation
Gold nanoparticles illuminate faint traces of disease
What is Facebook doing with its unprecedentedly large network?
A mini-magnetometer could inexpensively detect brain injury
Smart headlights could make difficult driving conditions safer
A new chemical process eliminates carbon dioxide emissions from lime production
A unique nanotube material may beat the best sorbents on the market
They promise to change the world. But how will their development be funded?