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Some high mountain meadows in the Pacific Northwest are declining rapidly due to climate change, a study suggests, as reduced snowpack, longer growing seasons and other factors allow trees to invade these unique ecosystems that once were carpeted with grasses, shrubs and wildflowers. […]

The ability of fluorescence microscopy to study labeled structures like cells has now been empowered to deliver greater spatial and temporal resolutions that were not possible before, thanks to a new method. Using this method, they were able to study the critical process of cell transport dynamics at multiple spatial and temporal scales and reveal, for the f […]

In the evolutionary long run, small critters tend to evolve into bigger beasts -- at least according to the idea attributed to paleontologist Edward Cope, now known as Cope's Rule. Using the latest advanced statistical modeling methods, a new test of this rule as it applies dinosaurs shows that Cope was right -- sometimes. […]

PAHs are common environmental pollutants found in automobile exhaust, barbequed foods and tobacco smoke. These molecules are converted into carcinogens in the body that attack DNA and cause cancer-inducing mutations. […]

During the early developmental stages of vertebrates, cells undergo extensive rearrangements, and some cells migrate over large distances to populate particular areas and assume novel roles as differentiated cell types. A new study provides new clues about this process -- at least in the case of neural crest cells, which give rise to most of the peripheral n […]