ScienceDaily: Top Science News |
- About one baby born each hour addicted to opiate drugs in U.S.
- Ireland's Aran Islands: Old maps and dead clams help solve coastal boulder mystery
- Why bigger animals aren't always faster
- Prenatal exposure to insecticide chlorpyrifos linked to alterations in brain structure and cognition
- Darwinian selection continues to influence human evolution
- Remarkable outburst seen from old black hole
- Rogue stars ejected from the galaxy are found in intergalactic space
- Old star, new trick: Astronomers have detected arsenic and selenium in ancient star for first time
- Rapid test strips detect bacterial contamination in swimming water
- Record-breaking radio waves discovered from ultra-cool star
- Yellowstone 'super-eruption' less super, more frequent than thought
- Twenty-four new species of lizards discovered on Caribbean islands are close to extinction
- Huge study finds brain networks connected to teen drug abuse
- Rats have best bite of rodent world
| About one baby born each hour addicted to opiate drugs in U.S. Posted: 30 Apr 2012 04:05 PM PDT About one baby is born every hour addicted to opiate drugs in the United States, according to new research. Physicians found that diagnosis of neonatal abstinence syndrome, a drug withdrawal syndrome among newborns, almost tripled between 2000 and 2009. |
| Ireland's Aran Islands: Old maps and dead clams help solve coastal boulder mystery Posted: 30 Apr 2012 01:43 PM PDT Perched atop the sheer coastal cliffs of Ireland's Aran Islands, ridges of giant boulders have puzzled geologists for years. What forces could have torn these rocks from the cliff edges high above sea level and deposited them far inland? While some researchers contend that only a tsunami could push these stones, new research finds that plain old ocean waves, with the help of some strong storms, did the job. |
| Why bigger animals aren't always faster Posted: 30 Apr 2012 12:21 PM PDT New research shows why bigger isn't always better when it comes to sprinting speed. "Typically, bigger animals tend to run faster than smaller animals, because they have longer legs," said the lead researcher. "But this only works up to a point. The fastest land animal is neither the biggest nor the smallest, but something in between. Think about the size of an elephant, a mouse and a cheetah." |
| Prenatal exposure to insecticide chlorpyrifos linked to alterations in brain structure and cognition Posted: 30 Apr 2012 12:20 PM PDT Even low to moderate levels of exposure to the insecticide chlorpyrifos during pregnancy may lead to long-term, potentially irreversible changes in the brain structure of the child, according to a new brain imaging study. The changes in brain structure are consistent with cognitive deficits found in children exposed to this chemical. |
| Darwinian selection continues to influence human evolution Posted: 30 Apr 2012 12:20 PM PDT New evidence demonstrates that humans are continuing to evolve and that significant natural and sexual selection is still taking place in our species in the modern world. Despite advancements in medicine and technology, as well as an increased prevalence of monogamy, research reveals humans are continuing to evolve just like other species. |
| Remarkable outburst seen from old black hole Posted: 30 Apr 2012 12:17 PM PDT An extraordinary outburst produced by a black hole in a nearby galaxy has provided direct evidence for a population of old, volatile stellar black holes. The discovery provides new insight into the nature of a mysterious class of black holes that can produce as much energy in X-rays as a million suns radiate at all wavelengths. |
| Rogue stars ejected from the galaxy are found in intergalactic space Posted: 30 Apr 2012 11:00 AM PDT Astronomers have identified nearly 700 rogue stars that appear to have been ejected from the Milky Way galaxy. |
| Old star, new trick: Astronomers have detected arsenic and selenium in ancient star for first time Posted: 30 Apr 2012 07:53 AM PDT For the first time, astronomers have detected the presence of arsenic and selenium, neighboring elements near the middle of the periodic table, in an ancient star in the faint stellar halo that surrounds the Milky Way. Arsenic and selenium are elements at the transition from light to heavy element production, and have not been found in old stars until now. |
| Rapid test strips detect bacterial contamination in swimming water Posted: 30 Apr 2012 07:48 AM PDT Researchers have developed a rapid testing method using a simple paper strip that can detect E. coli in recreational water within minutes. The new tool can close the gap between outbreak and detection, improving public safety. |
| Record-breaking radio waves discovered from ultra-cool star Posted: 30 Apr 2012 07:10 AM PDT Astronomers have discovered flaring radio emissions from an ultra-cool star that is not much warmer than the planet Jupiter, shattering the previous record for the lowest temperature at which radio waves had been detected from a star. The detection technique may be used to hunt for giant planets outside our solar system. |
| Yellowstone 'super-eruption' less super, more frequent than thought Posted: 30 Apr 2012 07:10 AM PDT The Yellowstone "super-volcano" is a little less super -- but more active -- than previously thought. Researchers say the biggest Yellowstone eruption, which created the two-million-year-old Huckleberry Ridge deposit, was actually two different eruptions at least 6,000 years apart. Their results paint a new picture of a more active volcano than previously thought and can help recalibrate the likelihood of another big eruption in the future. |
| Twenty-four new species of lizards discovered on Caribbean islands are close to extinction Posted: 30 Apr 2012 07:10 AM PDT Twenty-four new species of lizards known as skinks have been discovered on Caribbean islands, half of which already may be extinct or close to extinction. The loss of many skink species can be attributed primarily to predation by the mongoose -- a predatory mammal that was introduced by farmers. Other types of human activity, especially the removal of forests, also are to blame, according to the researchers. |
| Huge study finds brain networks connected to teen drug abuse Posted: 29 Apr 2012 12:22 PM PDT In a large imaging study of the human brain -- involving 1,896 14-year-olds -- scientists have discovered networks that go a long way toward explaining why some teenagers start experimenting with drugs and alcohol. Scientists report that differences in these brain networks make some adolescents more impulsive. These networks appear to exist prior to drug experimentation. Other separate brain networks were discovered that connect to ADHD. |
| Rats have best bite of rodent world Posted: 27 Apr 2012 09:02 PM PDT Scientists have found that mice and rats have evolved to gnaw with their front teeth and chew with their back teeth more successfully than rodents that 'specialize' in one or other of these biting mechanisms. |
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