Sid Perkins' Articles
- Deleted ScenesA new theory suggests atmospheric answer to the continuing paradox of why early Earth wasn’t icy.
- NewsAnalyses of discarded oyster shells confirm a deep drought during the Virginia colony’s earliest years.
- NewsAfter examining more than 90 new specimens of Nectocaris pteryx, paleontologists put it near the root of the cephalopod evolutionary tree.
- NewsMeasurements show a trend of rising temperatures along with a leveling off since 2003.
- NewsPhobos may be a mass of rocky rubble, not a captured asteroid.
- NewsThe feathers of Archaeopteryx and Confuciusornis probably were not strong enough to support sustained flight.
- NewsX-ray technique reveals original tissue in the feathers of a primitive bird fossil.
- NewsDips in Earth's gravitational field are tied to 'slab graveyards'
- NewsIn one species, adolescents appear to have sprouted a new type of feathers as they matured.
- Deleted ScenesEarly last decade, the world’s tree coverage dropped by more than 3 percent.