Science News From PhysOrg.Com
Scientists Suggest Protocol for Messaging Aliens
In 1974, humans broadcast the first message targeted at extraterrestrial life using the Arecibo radio telescope in Puerto Rico. The message, which was aimed at the globular star cluster M13 located 25,000 light years away, consisted of binary digits that encoded information about our DNA, as well as graphics of a human, our Solar System, and the Arecibo telescope. Since then, humans have sent three other messages to nearby stars and planets (20-69 light-years away). These messages have become more complex and anthropocentric, with music, photographs, and drawings submitted by the public.
Scientists Build World’s First Anti-Laser
More than 50 years after the invention of the laser, scientists at Yale University have built the world’s first anti-laser, in which incoming beams of light interfere with one another in such a way as to perfectly cancel each other out. The discovery could pave the way for a number of novel technologies with applications in everything from optical computing to radiology.
High Performance Capacitor Could Lead to Better Rechargeable Batteries
In order to develop next-generation electric vehicles, solar energy systems, and other clean energy technologies, researchers need an efficient way to store the energy. One of the key energy storage devices for these applications and others is a supercapacitor, also called an electric double-layer capacitor. In a recent study, scientists have investigated the possibility of using a material called zeolite-templated carbon for the electrode in this type of capacitor, and found that the material’s unique pore structure greatly improves the capacitor’s overall performance.
Prairie Dogs Kiss More When Being Watched
Researchers in the US studying the behavior of black-tailed prairie dogs at a local zoo have discovered they behave differently, kissing and cuddling each other more when people are watching than when they are unobserved.
Black-tailed prairie dogs (Cynomys ludovicianus) are known for their extremely social behavior, which includes kissing, grooming and touching each other. They are also known for their complex language of around 100 different barks, chirping sounds and yelps that convey information about predators, including the type of predator, their size, direction of travel, speed, and even their color. Previous research has shown they can also describe different human beings.
How Gendered Beliefs Funnel Women Away From Science and Engineering
Women earned only 18% of all Computer Science degrees and made up less than 25% of the workers in engineering- and computer-related fields in 2009. These statistics stand in stark contrast to the gains they have achieved in law, medicine, and other areas of the workforce. While this dearth of women in the science, technology, engineering, and math (STEM) fields is often attributed to lack of innate ability or desire on the part of women, the director of the Clayman Institute for Gender Research at Stanford, sociology professor Shelley Correll, sees this explanation as incomplete. And she offers a competing one: stereotypes.
Brief Diversions May Help Employees Improve Work, Study Says
A University of Illinois professor says people don’t need to feel guilty about checking personal e-mail, chatting with co-workers or addressing other minor distractions throughout the work day. Brief diversions may actually help people concentrate and improve their performance on more important tasks, says Alejandro Lleras, who wrote a study on the topic for the journal Cognition. Lleras works at the university’s Beckman Institute for Advanced Science and Technology in Urbana.
Lleras’ research seems to contradict long-standing theories that attention is a finite resource that runs out after a lengthy period of focus.
The Green Machine: Algae Clean Wastewater, Convert to Biodiesel
Let algae do the dirty work. Researchers at Rochester Institute of Technology are developing biodiesel from microalgae grown in wastewater. The project is doubly “green” because algae consume nitrates and phosphates and reduce bacteria and toxins in the water. The end result: clean wastewater and stock for a promising biofuel.
Scientists Investigate How Chemicals Evolved into Communication Signals
Living things possess many diverse ways of communicating, but perhaps the oldest and most widespread form of communication involves the use of chemicals. From animals and plants to bacteria and fungi, organisms emit and receive chemical signals as a way of transferring information between one another. Organisms are sensitive to a very broad range of chemicals; for example, scientists estimate that rodents can detect thousands or even tens of thousands of odorant molecules.
Experts Determine Age of Book ‘No Body Can Read’
University of Arizona researchers have cracked one of the puzzles surrounding what has been called “the world’s most mysterious manuscript” – the Voynich manuscript, a book filled with drawings and writings nobody has been able to make sense of to this day.
Using radiocarbon dating, a team led by Greg Hodgins in the UA’s department of physics has found the manuscript’s parchment pages date back to the early 15th century, making the book a century older than scholars had previously thought.
This tome makes the “DaVinci Code” look downright lackluster: Rows of text scrawled on visibly aged parchment, flowing around intricately drawn illustrations depicting plants, astronomical charts and human figures bathing in – perhaps – the fountain of youth. At first glance, the “Voynich manuscript” appears to be not unlike any other antique work of writing and drawing.






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