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 study tracing acoustic communication across the tree of life of land-living vertebrates reveals that the ability to vocalize goes back hundreds of millions of years, is associated with a nocturnal lifestyle and has remained stable. Surprisingly, acoustic communication does not seem to drive the formation of new species across vertebrates.