Sid Perkins' Articles
- NewsComparisons of data obtained from instruments that orbited Earth more than 25 years apart provide direct evidence that the planet's greenhouse effect increased significantly between 1970 and 1997.
- NewsA fossilized pellet of partially digested bones of juvenile and baby birds provides the first evidence that birds served as food for predators.
- NewsA fossil tooth found along a dinosaur trackway in South Korea is the first evidence that brachiosaurs roamed Asia.
- NewsSatellite observations of ocean temperatures in tropical regions of the western Pacific suggest that when ocean temperatures there warm up, the amount of heat-trapping cirrus clouds decreases, possibly providing a heat-venting effect that could help reduce global warming.
- FeatureIn the wake of one of the worst fire seasons in the past 50 years, scientists are assessing risk as more people move into fire-prone areas and developing ways to better predict the behavior of--and the potential for--wildfires.
- NewsEvidence trapped in 250-million-year-old sediments may help researchers pin the ultimate blame for the massive extinctions that occurred then on the impact of an extraterrestrial object about 9 kilometers across.
- NewsResearchers have developed a composite material that has the ability to repair small cracks within itself, a characteristic that could be used to extend the reliability and service life of electronic and aerospace components.
- NewsThe strength of the winter weather feature called the Siberian high is linked to the amount of early-season snow cover in its namesake region.
- NewsThe inactivity of a single enzyme in peat due to the lack of oxygen may be the only thing preventing massive releases of carbon dioxide from the peatlands.
- NewsThe recent discovery of several dozen extinct bee species in ancient amber deposits has led one paleontologist to propose that the very success of some bees' social lifestyle led to today's dearth of hive-dwelling species.