Rabu, 25 Mei 2016

ScienceDaily: Top Science News

ScienceDaily: Top Science News


Researchers find higher than expected carbon emissions from inland waterways

Posted: 24 May 2016 06:20 PM PDT

Greenhouse-gas emissions from lakes and inland waterways may be as much as 45 percent greater than previously thought, new research indicates.

Scientist suggests possible link between primordial black holes and dark matter

Posted: 24 May 2016 06:20 PM PDT

An intriguing alternative view is that dark matter is made of black holes formed during the first second of our universe's existence, known as primordial black holes. A scientist suggests that this interpretation aligns with our knowledge of cosmic infrared and X-ray background glows and may explain the unexpectedly high masses of merging black holes detected last year.

A 100-million-year partnership on the brink of extinction

Posted: 24 May 2016 06:20 PM PDT

A symbiotic relationship that has existed since the time of the dinosaurs is at risk of ending, as habitat loss and environmental change mean that a species of Australian crayfish and the tiny worms that depend on them are both at serious risk of extinction.

Study shows how air pollution fosters heart disease

Posted: 24 May 2016 06:20 PM PDT

A major, decade-long study of thousands of Americans found that people living in areas with more outdoor pollution -- even at lower levels common in the United States -- accumulate deposits in the arteries that supply the heart faster than do people living in less polluted areas. The deposits in the coronary arteries accelerate the progression of atherosclerosis, which can contribute to heart disease and heart attacks.

Poverty marks a gene, predicting depression

Posted: 24 May 2016 06:18 PM PDT

A long line of research links poverty and depression. Now scientists unveil some of the biology of depression in high-risk adolescents whose families are socioeconomically disadvantaged. The study combines epigenetics, brain imaging and behavioral data over three years. The results are part of a growing body of work that may lead to biological predictors that could guide individualized strategies for preventing depression.

Great apes communicate cooperatively

Posted: 24 May 2016 11:49 AM PDT

Gestural communication in bonobos and chimpanzees shows turn-taking and clearly distinguishable communication styles.

Hubble finds clues to the birth of supermassive black holes

Posted: 24 May 2016 11:49 AM PDT

Astrophysicists have taken a major step forward in understanding how supermassive black holes formed. Using data from Hubble and two other space telescopes, researchers have found the best evidence yet for the seeds that ultimately grow into these cosmic giants.

As more states legalize marijuana, adolescents' problems with pot decline

Posted: 24 May 2016 11:49 AM PDT

A survey of more than 216,000 adolescents from all 50 states indicates the number of teens with marijuana-related problems is declining. Similarly, the rates of marijuana use by young people are falling despite the fact more US states are legalizing or decriminalizing marijuana use and the number of adults using the drug has increased.

Money really does matter in relationships

Posted: 24 May 2016 09:42 AM PDT

Our romantic choices are not just based on feelings and emotions, but how rich we feel compared to others, a new study has found.

Coral bleaching 'lifeboat' could be just beneath the surface

Posted: 24 May 2016 09:40 AM PDT

A report commissioned by the United Nations offers a glimmer of hope to those managing the impact of bleaching on the world's coral reefs, including the Great Barrier Reef. The 35 authors of the United Nations Environmental Programme in-depth report say as the world's surface reefs are being threatened, part of the ecosystem may survive in these barely known deeper environments, known as mesophotic coral ecosystems (MCEs).

Early armored dinosaur from Texas lacked cousin's club-tail weapon, but had a nose for danger

Posted: 24 May 2016 09:34 AM PDT

First-ever CT scans of the early armored dinosaur Pawpawsaurus campbelli reveal that although the Texas dino lacked its cousin's club-tail it had a sharp nose for danger. A relative of Ankylosaurus, Pawpawsaurus's saving grace from predators may have been an acute sense of smell, says vertebrate paleontologists. Pawpawsaurus lived 100 million years ago, preceding Ankylosaurus by 35 million years. CT scans allow scientists to determine how the animal's brain functioned.

Astrophysicists detect most luminous diffuse gamma-ray emission from Arp 220

Posted: 24 May 2016 09:34 AM PDT

Astronomers have detected for the first time the most luminous gamma-ray emission from the merging galaxy Arp 220 -- the nearest ultraluminous infrared galaxy to Earth reveals the hidden extreme energetic processes in galaxies. Luminous infrared galaxies and ultraluminous infrared galaxies are the most luminous of all galaxies.

Couples study ties anger to heart problems, stonewalling to back pain

Posted: 24 May 2016 06:31 AM PDT

If you rage with frustration during a marital spat, watch your blood pressure. If you keep a stiff upper lip, watch your back. New research based on how couples behave during conflicts, suggests outbursts of anger predict cardiovascular problems. Conversely, shutting down emotionally or "stonewalling" during conflict raises the risk of musculoskeletal ailments such as a bad back or stiff muscles.

Genes linked to effects of mood and stress on longevity identified

Posted: 24 May 2016 05:53 AM PDT

The visible impacts of depression and stress can be found in alterations in genetic activity, according to newly published research.

How brain connects memories across time

Posted: 23 May 2016 08:37 AM PDT

Neuroscientists have identified in mice how the brain links different memories over time. While aging weakens these connections, the team devised a way for the middle-aged brain to reconnect separate memories.The findings suggest a possible intervention for people suffering from age-related memory problems.

The uncertain brain: Untangling ambiguity in neural circuits

Posted: 23 May 2016 08:37 AM PDT

Every day humans and animals face ambiguous circumstances. If we become sick after eating, we blame the food; however, if we then fall ill without having eaten that food, the causal link becomes ambiguous. New research findings reveal where and how such ambiguous associations are processed in the brains of rats.
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