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Science News Archive December 2011 - Page 9


Page 9 of 23

Solving a supernova mystery

A team of scientists has observed the early stages of a Type Ia supernova, refining our understanding of these explosive events. The discovery suggests that the primary star was a carbon-oxygen white dwarf, and analysis of matter ejected by the explosion points to a possible subgiant or main-sequence star as the secondary companion.

Controversy over Triceratops identity continues

Research led by John Scannella confirms that Triceratops is a single genus, resolving debate over the classification of Torosaurus and Nedoceratops. The study reveals that significant skeletal changes during development and natural variation within the genus cause specimens to exhibit varying features.

SourcePLOS·JournalPLOS ONE·DateDec 14, 2011

Removing sulfur from jet fuel cools climate

A Yale study found that removing sulfur from jet fuel has a small net cooling effect on the atmosphere. This is due to the formation of nitrate from nitrogen oxides in jet exhaust, which offsets the warming caused by sulfate particles formed by burning sulfur-laden fuel.

SourceYale University·JournalGeophysical Research Letters·DateDec 14, 2011

A new genre of tires: Call 'em 'sweet' and 'green'

A new genre of eco-friendly tires is being developed using genetically engineered microbes that produce raw materials from sugar. Companies like Goodyear and Michelin are partnering with biotechnology firms to create sustainable alternatives to traditional petroleum-based tires, which could debut within the next 3-5 years.

SourceAmerican Chemical Society·JournalChemical & Engineering News·DateDec 14, 2011

Worker ants paralyze and kill termites from afar

A study published in PLOS ONE found that worker ants can paralyze and kill termites without direct contact, thanks to their potent venom. The researchers discovered three functions of the ant venom: attracting nestmates, repelling alien ants, and killing termites.

SourcePLOS·JournalPLOS ONE·DateDec 14, 2011

Wayne State study shows early research on cellphone conversations likely overestimated crash risk

A Wayne State University study found that early research on cellphone conversations and crash risk may have overestimated the relative risk of conversation. Using GPS data, researchers tracked drivers over 400 days to find little driving consistency between control days, reducing the apparent risk of cellphone conversation.

Society may get stuck with the bill for expensive higher education

A study by North American economists found that the cost of higher education is becoming increasingly inaccessible to low-income students, who are now facing significant barriers to accessing credit for college. This trend could have far-reaching economic impacts, as it restricts career choices and leads to less qualified workers in ke...

SourcePenn State·JournalAmerican Economic Review·DateDec 14, 2011

Follow your nose

A study published in Nature Communications reveals that modern humans have a more developed sense of smell compared to Neanderthals, with larger olfactory bulbs and temporal lobes. This could be linked to improved behavioral and social functions.

SourceMax-Planck-Gesellschaft·JournalNature Communications·DateDec 14, 2011

Erosion of traditional 'taboos' threatens Madagascar's lemurs

Recent research in Madagascar reveals that illegal hunting of protected species, including lemurs, is widespread due to increasing appetites for meat and declining traditional taboos. The study suggests that improving access to domestic meats and disease control methods can help reduce pressure on wild species.

SourcePLOS·JournalPLOS ONE·DateDec 14, 2011

Pythons and people take turns as predators and prey

In a study co-authored by Cornell University researcher Harry Greene, men are attacked by giant pythons but also target them for food, competing for the same local deer, wild pigs, and monkeys. The complex relationships between humans and snakes highlight broader patterns of predation and competition in the natural world.

SourceCornell University·JournalProceedings of the National Academy of Sciences·DateDec 14, 2011

Jefferson researchers mirror human response to bacterial infection and resolution in mice

Thomas Jefferson University researchers have created a human immune system mouse model that closely mimics the response to a tick-borne infection in humans. The study found that mice developed B1b-like cells, specialized antibody-producing systems used to fight bacterial pathogens, which helped resolve the infection.

SourceThomas Jefferson University·JournalProceedings of the National Academy of Sciences·DateDec 14, 2011

Stress causes clogs in coffee and coal

Scientists at Duke University discovered that shear strain can cause particles like coffee beans and coal chunks to jam sooner than expected. This finding challenges previous theories and has implications for designing new composite materials and countermeasures against weapons of mass destruction.

SourceDuke University·JournalNature·DateDec 14, 2011

Toward a therapy to healing stroke

Researchers at KIT biologists identified key factors controlling thalamus development, enabling potential tissue replacement therapy for stroke patients. They are now developing 2D cell culture systems and 3D cultivation projects to activate these factors in undifferentiated cells.

SourceHelmholtz Association·JournalPLOS Biology·DateDec 14, 2011

University of Maryland finds restricting post-surgery blood transfusion is safe for some hip patients

A University of Maryland study found that restricting blood transfusions after hip surgery did not harm patients and may even be unnecessary for some. The research included over 2,000 patients with anemia after hip fracture and showed no significant difference in recovery rates between those who received moderate transfusions and those...

SourceUniversity of Maryland Medical Center·JournalNew England Journal of Medicine·DateDec 14, 2011

A black hole's dinner is fast approaching

Astronomers have discovered a unique new object, a dusty ionized gas cloud, nearly doubling its speed in seven years and approaching the event horizon of the black hole. The cloud will break apart completely over the next few years due to external pressure and gravitational pull.

SourceESO·JournalNature·DateDec 14, 2011