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Science News for January 30, 2008


After more than 100 years apart, webworms devastate New Zealand parsnips

Researchers found that New Zealand parsnips had lower levels of chemical defenses than those in Europe and North America, making them more susceptible to the parsnip webworm. The webworms are dramatically affecting the plant's ability to reproduce, with 75% of affected plants devoid of reproductive parts.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalProceedings of the National Academy of Sciences·DateJan 30, 2008

Deep brain stimulation may improve memory

A new study found that deep brain stimulation (DBS) of the hypothalamus can evoke detailed autobiographical memories in a patient with morbid obesity. After three weeks of continuous stimulation, the patient showed significant improvements in learning tests and was more likely to remember unrelated objects.

SourceWiley·JournalAnnals of Neurology·DateJan 30, 2008

New light on dark energy

Astronomers have measured the distribution and motions of thousands of galaxies in the distant Universe using ESO's VLT. This study provides a powerful way to tackle the mystery of dark energy, with results supporting the simplest form of dark energy.

SourceESO·JournalNature·DateJan 30, 2008

Study shows variety of approaches help children overcome auditory processing and language problems

A new study sponsored by NIDCD found that intensive educational approaches, including play with peers, can significantly improve language abilities in children with unusual difficulty understanding and using language. The study compared four intervention strategies and found that all resulted in long-term improvements.

Blue-eyed humans have a single, common ancestor

A team at the University of Copenhagen discovered that people with blue eyes have a single common ancestor due to a genetic mutation in the OCA2 gene. This mutation resulted in reduced melanin production in the iris, effectively 'diluting' brown eyes to blue. Brown-eyed individuals exhibit more individual variation in their DNA.

SourceUniversity of Copenhagen·JournalHuman Genetics·DateJan 30, 2008

In nature -- and maybe the corner office -- scientists find that generalists can thrive

Researchers design a mathematical model to describe circumstances where generalists can endure and even thrive in what is typically expected to be a specialist-only society. The study's findings suggest that having individuals with diverse skills can safeguard against the possibility that specialists don't complement each other.

SourceOhio State University·JournalJournal of Theoretical Biology·DateJan 30, 2008

Where in the world

Global positioning systems technology can be used to study how children develop spatial awareness and orient themselves in the real world. The study found that children aged three years old could use environmental landmarks to guide their search, improving performance with larger test areas and different colored buckets.

SourceUniversity of Bristol·JournalCognition·DateJan 30, 2008

UMass Medical School study finds patients diagnosed with coronary heart disease continue poor diets

A recent UMass Medical School study found that over 80% of patients diagnosed with coronary heart disease do not improve their diet one year after diagnosis. The study used the Alternative Health Eating Index to assess dietary quality and found that only a small percentage of patients met recommended daily intake levels for fruits, veg...

SourceUMass Chan Medical School·JournalJournal of the American Dietetic Association·DateJan 30, 2008

Paired earthquakes separated in time and space

Researchers discovered a rare doublet earthquake event near Japan, with two large quakes occurring over 60 days apart. The second quake was triggered by bending of the Pacific plate, shedding light on seismic dynamics and potential hazards in regions far from tectonic plate boundaries.

SourcePenn State·JournalNature·DateJan 30, 2008

Anemia treatment may be a double-edged sword

A mouse study reveals that erythropoietin keeps blood vessels alive and growing in the eye, but administering it at the wrong time may worsen diseases. The hormone's effects depend on timing, with early administration potentially slowing disease progression and late administration accelerating it.

SourceBoston Children's Hospital·JournalJournal of Clinical Investigation·DateJan 30, 2008

More religious women less likely to get an abortion

A new study published in Social Science Quarterly reveals that religious women are less likely to obtain abortions compared to secular women. This is because religious women tend to lead more sexually conservative lifestyles, which reduces their likelihood of becoming pregnant before marriage and seeking an abortion.

SourceBlackwell Publishing Ltd.·JournalSocial Science Quarterly·DateJan 30, 2008

Gene predicts heart attack response and cardiac damage

A protein called macrophage migration inhibitory factor (MIF) has been found to activate AMPK, a key regulator of cellular energy balance, protecting the heart from injury during a heart attack. MIF may help identify individuals at higher risk for cardiac damage during a heart attack based on their genetic characteristics.

SourceYale University·JournalNature·DateJan 30, 2008