New program examines stem cells' potential to repair, replace damaged tissue
...aking molds or X-rays of teeth then making caps or crowns to restore form and function. "It's a very important area," he says of the interest in regeneration. "What we are particularly interested in is being able to reconstruct people with facial cancer. Oral facial cancer is one of the most disfiguring dis...Woods Hole Research Center plans controlled burn in Amazon rainforest
...e standing fuel carries the flames higher into the crowns of trees that have managed to survive the ground fires at their bases. Ultimately, Center scientists will burn some areas yearly for several years in a row to carefully monitor fire behavior, and to see how many fires a forest can withstand and ulti...Researchers give name to ancient mystery creature
...d Horolodectes sunae, for the unusual shape of the crowns of the teeth. Horolodectes lived about 60 million years ago, soon after the dinosaurs went extinct, in a period known for its rapid diversification of small mammals. Based on careful examination of tooth and jaw fragments that have been unearthed ove...Fossil is missing link in elephant lineage
...roup, including molars with more cusps and complex crowns and the delayed maturation and emergence of molars," said Sanders, an assistant research scientist in the U-M Museum of Paleontology. But the creature that the new fossil represents also had characteristics in common with palaeomastodonts, namely sma...Dental crowns reveal the diet of a species
...he teeth of various species by measuring the molar crowns of 81 mammalian species and, based on the measurements, creating 3D virtual models of them. The models were then used to develop new methods of measurement, which enable scientists to identify all the parts of teeth that break down the food, the 'too...Salvage logging, replanting increased biscuit fire severity
...ut the study showed that total consumption of tree crowns in a recurring fire situation is more severe in the managed stands than the natural ones, at least when there are one to two decades between fires. This research was done with satellite data, government agency records and aerial photography, in the......y point in their long-term survival, placing their crowns above the height easily browsed by elk and other animals. Tree growth in some stands has been particularly apparent just in the past 4-5 years. The long-term decline, to the point of localized extinctions, of aspen and cottonwood trees in Yellowsto...