Featured series 
Tag: Faculty of Arts and Sciences
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Health
TB susceptibility gene identified
As many as one out of three people in the world are infected with the bacteria that causes tuberculosis, public health experts estimate. That could lead to a global plague were it not for the fact that only one out of 10 infected people actually develops the disease. Still, TB is a major global health…
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Health
Stronger evidence found linking Epstein-Barr virus and risk of multiple sclerosis
Researchers from the Harvard School of Public Health, Kaiser Permanente, and a team of collaborators have found further evidence implicating the Epstein-Barr virus (EBV) as a possible contributory cause to multiple sclerosis. The study appears in the advance online edition of the June 2006 issue of Archives of Neurology. MS is a chronic degenerative disease…
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Science & Tech
Case of Sedna’s ‘missing moon’ solved
In trying to solve the riddle of Sedna’s “missing moon,” scientists Scott Gaudi, Krzysztof (Kris) Stanek and colleagues at the Harvard-Smithsonian Center for Astrophysics took measurements that have cleared up the mystery by showing that a moon wasn’t needed after all. Sedna is rotating much more rapidly than originally believed, spinning once on its axis…
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Science & Tech
Human skull is 7 million years old
When a 7-million-year-old skull was first found, Daniel Lieberman, a professor of anthropology at Harvard, called it “one of the greatest discoveries of the past 100 years.” After studying new evidence including teeth and jaw fragments, Lieberman stands by that statement. “The next oldest, reasonably complete humanlike skull we have is just over 3 million…
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Science & Tech
Astronomers measure slowest motion across the sky
“A snail crawling on Mars would appear to be moving across the surface more than 100 times faster than the motion we measured for this galaxy,” said Mark Reid of the Harvard-Smithsonian Center for Astrophysics, a co-author on the paper. Reid and his colleagues used the National Science Foundation’s Very Long Baseline Array (VLBA) to…
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Science & Tech
High school AP courses do not predict college success in science
A survey of 18,000 college students enrolled in introductory biology, chemistry, and physics has found little evidence that high school Advanced Placement (AP) courses significantly boost college performance in the sciences. The study by researchers at Harvard University and the University of Virginia (UVA) found the best predictors of success in college science courses to…
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Campus & Community
The accidental ‘best friend’
Harvard researchers studying Siberian foxes have uncovered evidence that the ability to interpret human expressions and gestures that helped transform the wild wolf into humankind’s cooperative “best friend” may have occurred by accident. The research casts doubt onto a previous theory that domestic dogs’ ability to interpret human communication results from generations of selection for…
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Health
Older doctors less likely to follow current standards of care
The study included a review of previously published papers with a large sample size of doctors. These studies included measures of physician knowledge or quality of care as well as the time since the physician’s medical school graduation or the physician’s age. The majority of these studies showed a decline in performance with time. Co-author…
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Health
Snaring secrets of the Venus flytrap
While “speed” is not a word most people associate with the plant kingdom, the Venus flytrap closes its v-shaped leaves in just one-tenth of a second – fast enough to accomplish a feat thousands if not millions of backyard barbecuers fail at each summer: snaring a fly. So how can a plant pull this off?…
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Health
One alcoholic drink per day improves cognitive function among older women
According to the study’s senior author, BWH’s Francine Grodstein, Sc.D., “Much evidence has demonstrated the heart benefits of light alcohol drinking, but less research has focused on cognitive functioning. While we all continue to recommend exercising caution when consuming any type of alcohol, our study suggests that moderate consumption might provide older women some cognitive…
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Health
RNA-making apparatus seen to uncoil and recoil DNA
Eukaryotic cells like to keep their DNA under wraps, winding the long strands of nucleic acid around millions of little protein complexes. This bead-on-a-string structure, called chromatin, ensures that the DNA is protected and also helps to condense the long strands of nucleic acid so they more easily are accommodated in the nucleus. Chromatin also…
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Science & Tech
Astronomers spot the Great Orion Nebula’s successor
Astronomers announced Jan. 11, 2006, that they have found the next Orion Nebula. Known as W3, this glowing gas cloud in the constellation Cassiopeia has just begun to shine with newborn stars. Shrouds of dust currently hide its light, but this is only a temporary state. In 100,000 years – a blink of the eye…
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Science & Tech
See-through galaxy
To peer into the galactic center of our own Milky Way galaxy, astronomers Silas Laycock and Josh Grindlay used the unique capabilities of the 6.5-meter-diameter Magellan Telescope in Chile. By gathering infrared light that more easily penetrates dust, the astronomers were able to detect thousands of stars that otherwise would have remained hidden. Their goal…
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Science & Tech
Scientists find black hole’s ‘point of no return’
By a score of 135 to zero, scientists using NASA’s Rossi X-ray Timing Explorer have compared suspected neutron stars and black holes and found that the black holes behaved as if each one has an event horizon, the theoretical border from beyond which nothing, not even light, can escape. The team found that X-ray light…
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Science & Tech
When oil became black gold
Texas, Alaska, Russia, the Middle East – these are the regions one is likely to think of when asked to name the world’s top oil- producing areas. Galicia, an area of Eastern Europe now divided between Poland and Ukraine, would probably not make it onto anyone’s list. And yet, 100 years ago, Galicia ranked as…
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Health
Study finds that both weight and exercise are key to longevity
Over 115,000 participants who were free of cardiovascular disease or cancer, who were between the ages of 30 and 55 and had filled out biennial health and lifestyle questionnaires between 1976 and 2000, were chosen for the study from the Brigham and Women’s Hospital-based Nurses’ Health Study. The women answered questionnaires that asked on average…
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Health
Molecule implicated in transcription termination
When a protein is made its DNA code must first be rewritten as messenger RNA (mRNA). This process of transcription requires a large enzyme complex, RNA polymerase, to begin at the start of a gene, work its way along copying the DNA into mRNA, and then stop when it gets to the end. Therein lies…
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Health
Study finds women hesitant to take tamoxifen as preventive measure
“Our study underscores the need [for medical professionals] to address psychological factors that may influence decision- making, in order to help women feel confident and satisfied with their treatment choice,” says the study’s lead author, Sharon Bober, PhD, staff psychologist at Beth Israel Deaconess Medical Center (BIDMC) and Dana-Farber Cancer Institute (DFCI) and clinical instructor…
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Campus & Community
Warming called a global ‘experiment’
Climate scientist Daniel Schrag says that human-caused climate change is inevitable, though scientists don’t know exactly how severe or even exactly what its effects will be. Schrag said the public health effects related to climate change would probably be most severe in poorer nations. Though climate effects will be experienced in richer nations, those countries…
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Science & Tech
Alien treasures in our backyard
Astronomers have gained an important clue to guide their hunt for extrasolar worlds. And that clue points to the unlikeliest of places — our own backyard. “It’s possible that some of the objects in our solar system actually formed around another star,” says astronomer Scott Kenyon (Smithsonian Astrophysical Observatory). How did these adopted worlds join…
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Science & Tech
Taking a CAT scan of the early universe
Reporting in the Nov. 11, 2004, issue of Nature, astrophysicists J. Stuart B. Wyithe (University of Melbourne) and Abraham Loeb (Harvard-Smithsonian Center for Astrophysics) have calculated the size of cosmic structures that will be measured when astronomers effectively take CAT scan-like images of the early universe. Those measurements will show how the universe evolved over…
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Health
Studies demonstrate positive data in treatment of hepatitis C
Presented by Nezam Afdhal, M.D., chief of Hepatology at Beth Israel Deaconess Medical Center (BIDMC) and associate professor of medicine at Harvard Medical School, the new findings demonstrate promising results for hepatitis C patients who have not responded to existing therapies. According to Afdhal, the most recent advance in treatment has been the pegylation of…
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Health
Study says therapy better than pills in treating sleep-onset insomnia
The findings show non-drug techniques yield better short- and long-term results than the most widely prescribed sleeping pill, zolpidem, commonly known as Ambien. “Sleeping pills are the most frequent treatment for insomnia, yet CBT techniques clearly were more successful in helping the majority of study participants to become normal sleepers,” said study leader Gregg Jacobs.…
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Science & Tech
Charter schools get high grades
For many parents, educators, and policy-makers in the United States, charter schools – innovative public schools that are free from much bureaucratic oversight but must “compete” for students in order to retain their charters – have held out enormous promise as a public alternative to failing traditional schools. So when the American Federation of Teachers…
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Campus & Community
Barcelona works
A pioneer in his field, Richard forman has helped forge the basic concepts of landscape ecology, a science that sees the surface of the Earth as a complex mosaic linked by movements of people, animals, water, energy, nutrients, and other elements. It is a vision that goes well beyond urban planning in that, for example,…
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Health
Walking improves cognitive functions in older women
In a study, elderly women who engaged in the most activity — for example, walking at least 6 hours per week — had a 20 percent decrease in risk of cognitive impairment compared to those who were inactive. they also demonstrated the cognitive functioning of someone three-years younger than their actual age. The findings were…
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Science & Tech
Galactic collision reveals fate of Milky Way galaxy
Sixty-eight million light-years away, the Antennae galaxies are locked in a dance of death, with stars being ripped from their orbits and spiral arms being shredded into streamers that dangle in space. Several billion years from now, our home — the Milky Way galaxy — might look the same as the Andromeda galaxy smashes into…
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Health
Surprising variations discovered in human genomes
Researchers from Harvard Medical School and the University of Toronto in Canada looked at 55 healthy, unrelated men and women, and they discovered 255 regions with relatively large gains or losses in their DNA. “We were extraordinarily surprised to see that some people have so much more or less DNA,” says Charles Lee, a geneticist…
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Science & Tech
Tiny “David” telescope finds “Goliath” planet
A newfound planet detected by a small, 4-inch-diameter telescope demonstrates that we are at the cusp of a new age of planet discovery. Soon, new worlds may be located at an accelerating pace, bringing the detection of the first Earth-sized world one step closer. “This discovery demonstrates that even humble telescopes can make huge contributions…