While picking apart the genetic makeup of the plant Arabidopsis, two Dartmouth researchers made a startling discovery. They found that approximately 36 percent of its genome is potentially regulated by the circadian clock, which is three and a half times more than had previously been estimated.

The study, which appears in the June issue of Plant Physiology, was conducted by C. Robertson McClung, Dartmouth professor of biological sciences, and Todd Michael, a former Dartmouth graduate studen

As premature infants often have under-developed lungs, oxygen is administered following birth. One devastating side effect, however, is the development of retinopathy of prematurity (ROP), whereupon oxygen administration to the infant suppresses the expression of essential growth factors that promote the development of retinal blood vessels, resulting in blindness. In the July 1 issue of the Journal of Clinical Investigation, a study by researchers at Harvard Medical School and Children’s Hospit

ESA’s Mars Express spacecraft is progressing further every day on its journey to the Red Planet. Everything is set for arrival at Mars on the night of 25 December 2003, after a journey of about 400 million kilometres. In the weeks since its launch, engineers have started to thoroughly test the spacecraft and its equipment.

This testing phase is standard for all spacecraft on the way to their destination. Known as commissioning, it began 3 weeks after the launch. During this time, ground cont

Researchers at the University of Pittsburgh have completed the first survey of the entire human genome for genes that affect the susceptibility of individuals to developing clinical depression.

George S. Zubenko, M.D., Ph.D., professor of psychiatry at the University of Pittsburgh School of Medicine and adjunct professor of biological sciences at Carnegie Mellon University and his team have located a number of chromosomal regions they say hold the genetic keys to a variety of mental illness

Students in an online class who learned networking through a commercially available simulation scored higher and retained more course information than students taught with a traditional network-diagramming software package, says a Penn State researcher.

“Those students also demonstrated better understanding of the networking concepts and indicated they spent more time on course assignments,” said Brian Cameron, instructor in Penn State’s School of Information Sciences and Technology (I

What determines the number of species in a given area? The amount of energy available to organisms (an area’s primary productivity) has been shown to be a key determinant of plant and animal biodiversity. However, it is not known if primary productivity can affect bacterial biodiversity. In an article to appear in the July 2003 issue of Ecology Letters, researchers led by a team at Stanford University report for the first time that primary productivity can, in fact, influence the diversity of ba