ScienceDaily: Top Science News

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• Evidence of 3.5-billion-year-old bacterial ecosystems found in Australia
• Thin, active invisibility cloak demonstrated for first time
• New paradigm for solar cell construction demonstrated

Evidence of 3.5-billion-year-old bacterial ecosystems found in Australia Posted: 12 Nov 2013 01:32 PM PST Reconstructing the rise of life during the period of Earth's history when it first evolved is challenging. Earth's oldest sedimentary rocks are not only rare, but also almost always altered by hydrothermal and tectonic activity. A new study has revealed the well-preserved remnants of a complex ecosystem in a nearly 3.5 billion-year-old sedimentary rock sequence in Australia.

Thin, active invisibility cloak demonstrated for first time Posted: 12 Nov 2013 10:26 AM PST Invisibility cloaking is no longer the stuff of science fiction: scientists have demonstrated an effective invisibility cloak that is thin, scalable and adaptive to different types and sizes of objects. Professor George Eleftheriades and PhD student Michael Selvanayagam have designed and tested a new approach to cloaking—by surrounding an object with small antennas that collectively radiate an electromagnetic field. The radiated field cancels out any waves scattering off the cloaked object. Their paper 'Experimental demonstration of active electromagnetic cloaking' appears today in the journal Physical Review X.

New paradigm for solar cell construction demonstrated Posted: 12 Nov 2013 09:38 AM PST Researchers have experimentally demonstrated a new paradigm for solar cell construction which may ultimately make them less expensive, easier to manufacture and more efficient at harvesting energy from the sun.

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