Overfishing Large Sharks Impacts Entire Marine Ecosystem, Shrinks Shellfish Supply:
Fewer big sharks in the oceans mean that bay scallops and other shellfish may be harder to find at the market, according to an article in the March 30 issue of the journal Science, tying two unlikely links in the food web to the same fate.
Dinosaur Extinction Didn’t Cause The Rise Of Present-day Mammals, Claim Researchers:
A new, complete ‘tree of life’ tracing the history of all 4,500 mammals on Earth shows that they did not diversify as a result of the death of the dinosaurs, says new research published in Nature.
Nanoparticles Can Track Cells Deep Within Living Organisms:
To the delight of researchers at Washington University School of Medicine in St. Louis, living cells gobbled up fluorine-laced nanoparticles without needing any coaxing. Then, because of the unusual meal, the cells were easily located with MRI scanning after being injected into mice.
Scientists Reveal Structure Of Gateways To Gene Control:
Scientists at Penn State University will reveal in the 29 March 2007 issue of the journal Nature the first complete high-resolution map of important structures that control how genes are packaged and regulated throughout an entire genome. “For the first time, we are seeing in very high resolution on a genome-wide scale how nucleosomes control the expression of an organism’s genes,” said B. Franklin Pugh, professor of biochemistry and molecular biology and the study’s lead investigator.