Few singers reach their sunset years with the same voice they had in younger days. Songbirds are no different. New research reveals that elderly swamp sparrows don't sound quite like they used to -- nor do they strike the same fear in other males who may be listening in. Humans are remarkably good at guessing […]
A new species of feathered dinosaur has been discovered in China. The one-of-a-kind specimen preserves feathers and bones that provide new information about how dinosaurs grew and how they differed from birds.