Mars Mission Lasts Well Past Sell-By Date

At this very moment, on an alien world millions of miles from Earth, two wheeled robots named Spirit and Opportunity are dutifully exploring Mars. But by all previous accounts, these Mars Exploration Rovers (MERs) should ...

Nano World: Chemical sensing transistors

Hybrid transistors using stacks of organic molecules for wires and carbon nanotubes as electrodes could serve as ultrasensitive sensors for explosives and other compounds, experts told UPI's Nano World.