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Science News Archive 2009 - Page 164


Page 164 of 277

Squid 'sight': Not just through eyes

Researchers at the University of Wisconsin-Madison have discovered that certain squids can perceive light through a light-emitting organ beyond their eyes. This finding may lead to new insights into controlling and perceiving light. The study suggests that the squid's light organ, which is also involved in camouflage, uses the same pro...

SourceUniversity of Wisconsin-Madison·JournalProceedings of the National Academy of Sciences·DateJun 1, 2009

Culture, not biology, underpins math gender gap

Researchers from University of Wisconsin-Madison report that culture, not biology, underpins the math gender gap. Girls are now performing on par with boys in standardized mathematics tests and taking calculus at the same rate. The study challenges the validity of the greater male variability hypothesis, suggesting that providing femal...

SourceUniversity of Wisconsin-Madison·JournalProceedings of the National Academy of Sciences·DateJun 1, 2009

Wiping out the world's mass migrations

A recent study analyzes the impact of human activity on large-scale terrestrial migrations, revealing that up to a quarter of migrating species have gone extinct. Human activities such as fencing, farming, and water restrictions have altered habitats and reduced migration routes, leading to significant declines in animal populations.

SourceAmerican Museum of Natural History·JournalEndangered Species Research·DateJun 1, 2009

Targeting breast cancer stem cells in mice

PTEN is often inactivated in breast cancer, leading to poor patient outcomes. Researchers found that a drug called perifosine specifically targets the breast cancer stem cell population by inhibiting the Akt pathway, reducing tumor-forming cells by up to 90%.

SourcePLOS·JournalPLOS Biology·DateJun 1, 2009

MIT: New system monitors fetal heartbeat

A new system developed by MIT scientists can monitor the fetal heartbeat noninvasively, allowing for early detection of potential problems. The system separates the maternal ECG signal from the fetus's and background noise thanks to a complex algorithm, enabling clinicians to catch subtle variations in the fetal heartbeat.

SourceMassachusetts Institute of Technology·JournalIEEE Transactions on Biomedical Engineering·DateJun 1, 2009

TV noise associated with fewer verbal interactions between infants and parents

A recent study published in Archives of Pediatrics & Adolescent Medicine found that every hour of TV exposure is linked to a 7% decrease in the number of words an adult says to an infant. This reduction in verbal interactions also affects the length and frequency of child vocalizations and conversational turns between adults and children.

SourceJAMA Network·JournalArchives of Pediatrics and Adolescent Medicine·DateJun 1, 2009

Retained elementary students often do not get special education plan

A study found that many retained elementary students do not receive individualized special education services, even if they are eligible. Children from lower socioeconomic backgrounds were less likely to receive these services. The lack of IEPs raises concerns about the special education needs of retained children.

SourceJAMA Network·JournalArchives of Pediatrics and Adolescent Medicine·DateJun 1, 2009

Stellar explosion displays massive carbon footprint

Astronomers at the University of Warwick have discovered that the 2006 stellar explosion SCP 06F6 bears remarkable resemblance to extremely carbon-rich stars. The object's unusual characteristics suggest it may be a new type of supernova, with properties distinct from normal Type II supernovae.

SourceUniversity of Warwick·JournalThe Astrophysical Journal Letters·DateJun 1, 2009

Penn researchers discover genetic risk factor for testicular cancer

A study published in Nature Genetics found that men with two copies of the KITLG gene have a 4.5-fold higher risk of testicular cancer, while those with two copies of the SPRY4 gene have a 1.48-fold higher risk. The discovery sheds light on genetic factors contributing to the disease and may help identify critical environmental factors.

Liver disease 'shrunk' by blood-pressure drug

A clinical trial has shown that losartan, a blood-pressure medicine, can shrink liver scarring and allow the organ to repair itself in some patients with early-stage liver failure. The drug works by blocking a signalling pathway that causes scar tissue to accumulate, allowing the damaged area of the liver to be repaired.

SourceNewcastle University·JournalGASTROENTEROLOGY·DateMay 31, 2009

International Serious Adverse Events Consortium announces initial study results in its global research collaboration to identify genetic markers related to drug induced liver injury

Researchers have discovered genetic markers that predict individuals at risk for serious drug-induced liver injury. The study found that HLA-B*5701 is a major determinant of liver injury induced by flucloxacillin, and variations on chromosome 3 also influence the risk.