



A 400 million-year-old fossil of a coelacanth fin, the first finding of its kind, fills a shrinking evolutionary gap between fins and limbs. University of Chicago scientists describe the finding in a paper highlighted on the cover of the July/August 2007 issue of Evolution and Development. The fossil shows that the ancestral pattern of lobed fins closely resembles the pattern in the fins of primitive living ray-finned fishes, according to the scientists…
Chickadees, nuthatches and warblers foraging their way through forests have been shown to spur the growth of pine trees in the West by as much as one-third, according to a new University of Colorado at Boulder study. The study showed birds removed various species of beetles, caterpillars, ants and aphids from tree branches, increasing the vigour of the trees, said study author Kailen Mooney. Mooney, who conducted the study as part of his doctoral research in CU-Boulder's ecology and evolutionary biology department, said it is the first study to demonstrate that birds can affect the growth of conifers…
Picture a cool place, teeming with a multitude of hot bodies twirling about in rapidly changing formations of singles and couples, partners and groups, constantly dissolving and reforming. If you were thinking of the dance floor in a modern night club, think again. It's a description of the shells around dying stars, the place where newly formed elements make compounds and life takes off, said Katharina Lodders, PhD, research associate professor of earth and planetary sciences in Arts and Sciences at Washington University in St Louis…
Spitzer images out-of-this-world galaxy
Quantum measurements: Common sense is not enough