ScienceDaily: Top Science News

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• Causes of 2011 Arctic ozone hole determined
• Study predicts lag in summer rains over parts of US and Mexico
• Creating indestructible self-healing circuits
• Astronomers conduct first remote reconnaissance of another planetary system
• Hope for threatened Tasmanian devils
• Lunar impacts created seas of molten rock
• Designing interlocking building blocks to create complex tissues
• Tiny piece of RNA keeps 'clock' running in earliest stages of life
• Closest star system found in a century
• Antibiotics are unique assassins
• Mummy CT scans show preindustrial hunter gatherers had clogged arteries
• Does winning an Emmy, an election, or entry to the Baseball Hall of Fame mean you will live longer than those you beat?

Causes of 2011 Arctic ozone hole determined Posted: 11 Mar 2013 02:39 PM PDT A combination of extreme cold temperatures, human-made chemicals and a stagnant atmosphere were behind what became known as the Arctic ozone hole of 2011, a new study finds.

Study predicts lag in summer rains over parts of US and Mexico Posted: 11 Mar 2013 02:39 PM PDT A delay in the summer monsoon rains that fall over the southwestern United States and northwestern Mexico is expected in the coming decades according to a new study. The North American monsoon delivers as much as 70 percent of the region's annual rainfall, watering crops and rangelands for an estimated 20 million people.

Creating indestructible self-healing circuits Posted: 11 Mar 2013 02:39 PM PDT Engineers, for the first time ever, have developed self-healing integrated chips.

Astronomers conduct first remote reconnaissance of another planetary system Posted: 11 Mar 2013 02:37 PM PDT Researchers have conducted a remote reconnaissance of a distant planetary system with a new telescope imaging system that sifts through the blinding light of stars. Using a suite of high-tech instrumentation and software called Project 1640, the scientists collected the first chemical fingerprints, or spectra, of this system's four red exoplanets, which orbit a star 128 light years away from Earth.

Hope for threatened Tasmanian devils Posted: 11 Mar 2013 02:36 PM PDT New research paves the way for the development of a vaccine for the Tasmanian devil, currently on the brink of extinction because of a contagious cancer.

Lunar impacts created seas of molten rock Posted: 11 Mar 2013 12:12 PM PDT The impact that formed the Moon's Orientale basin created a sea of melted rock 220 miles across and 6 miles deep, according to a new analysis. Similar seas of impact melt were probably present in at least 30 other large impact sites. Rocks formed as these basins cooled and solidified could mimic rocks formed very early in the Moon's history.

Designing interlocking building blocks to create complex tissues Posted: 11 Mar 2013 12:08 PM PDT A new "plug-and-play" method to assemble complex cell microenvironments is a scalable, highly precise way to fabricate tissues with any spatial organization or interest—like those found in the heart or skeleton or vasculature. The study reveals new ways to better mimic the enormous complexity of tissue development, regeneration, and disease.

Tiny piece of RNA keeps 'clock' running in earliest stages of life Posted: 11 Mar 2013 12:08 PM PDT New research shows that a tiny piece of RNA has an essential role in ensuring that embryonic tissue segments form properly.

Closest star system found in a century Posted: 11 Mar 2013 09:40 AM PDT A pair of newly discovered stars is the third-closest star system to the Sun and the closest discovered since 1916. At 6.5 light years, it is so close that Earth's television transmissions from 2006 are now arriving there. It is an excellent hunting ground for planets because it is very close to Earth and, in the distant future, it might be one of the first destinations for manned expeditions outside our solar system.

Antibiotics are unique assassins Posted: 11 Mar 2013 07:17 AM PDT In recent years, the notion that there is a single mechanism by which antibiotics wipe out bacteria has permeated the field of microbiology. Now, new research questions that hypothesis.

Mummy CT scans show preindustrial hunter gatherers had clogged arteries Posted: 11 Mar 2013 06:15 AM PDT Like nearly 4.6 million Americans, ancient hunter-gatherers also suffered from clogged arteries, revealing that the plaque build-up causing blood clots, heart attacks and strokes is not just a result of fatty diets or couch potato habits.

Does winning an Emmy, an election, or entry to the Baseball Hall of Fame mean you will live longer than those you beat? Posted: 11 Mar 2013 06:07 AM PDT Research has long linked high socioeconomic status with better health and lower mortality. But what's remained unclear is whether this association has more to do with access to resources (education, wealth, career opportunity, etc.) or the glow of high social status relative to others.

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