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The "W-Ink" technology has only become possible due to a seamless fusion and interaction between chemistry, optics, condensed matter, and fluidics. (A) In the prototype device discussed in JACS, the chip appears blank in the air. When dipped in varying concentrations of ethanol, however, it reveals new markings. (B) Because all liquids exhibit a surface tension, this indicator has the potential to be used to differentiate between liquids of any type.

Big server farms are a major consumer of electricity in the United States. Using their heat to warm homes and offices could cut costs and save energy.

Burning patterns into graphite oxide with a laser turns the thin sheets into fully functional supercapacitors, according to a new paper by Rice University scientists in Nature Nanotechnology.

A 2-by-2 array of crossbar switches where memory-resistors at each crossing operate like synapses in the brain.

NASA's Dawn spacecraft obtained this image with its framing camera on July 23, 2011.

Google and Microsoft have just completed another salvo in their ongoing Web-based e-mail war.

For those of us who have been working in this field for some time — which in my case is about 30 years — the mood in Rome was positive, with a palpable sense of encouragement. This was largely fueled by two things: new evidence of the long-term benefits of antiretroviral treatment efforts to date, and new scientific breakthroughs regarding the benefits of treatment for prevention. These developments are transforming the way we think about AIDS.

Universities nationwide have signed onto Gig.U by soliciting ideas for how to extend gigabit per second local-area network speeds over long-distance connections.

A spherical robot equipped with a camera is being proposed to navigate underground pipes at nuclear reactors to locate potential cracks that could leak radioactive water.