News articles tagged with 'species' (Page 162)
Caribbean extinctions occurred 2M years after apparent cause
— 12 Mar 2007 23:17 | Geology and palaeontologySmithsonian scientists and colleagues report a new study that may shake up the way palaeontologists think about how environmental change shapes life on Earth. The researchers summarised…
Disease opened door to invading species in California
— 12 Mar 2007 23:17 | EnvironmentPlant and animal diseases can play a major and poorly appreciated role in allowing the invasion of exotic species, which in turn often threatens biodiversity, ecological function and…
A rarity among arachnids, whip spiders have a sociable family life
— 12 Mar 2007 19:00 | BiologyWhip spiders, considered by many to be creepy-crawly, are giving new meaning to the term touchy-feely. In two species of whip spiders, or amblypygids, mothers caress their young with…
Why do birds migrate?
— 5 Mar 2007 07:00 | BiologyWhy do some birds fly thousands of miles back and forth between breeding and non-breeding areas every year whereas others never travel at all? One textbook explanation suggests either…
Lessons in wood formation from Arabidopsis
— 5 Mar 2007 07:00 | BiologyWood is formed from secondary xylem tissue consisting of cells with a heavily thickened secondary cell wall that is enriched in lignin and cellulose. In contrast, primary cell walls…
New study rewrites evolutionary history of vespid wasps
— 5 Mar 2007 07:00 | BiologyScientists at the University of Illinois have conducted a genetic analysis of vespid wasps that revises the vespid family tree and challenges long-held views about how the wasps social…
Discovery of new cave millipedes in Arizona
— 5 Mar 2007 07:00 | BiologyA new genus of millipede was recently discovered by a Northern Arizona University doctoral student and a Bureau of Land Management researcher. J. Judson Wynne, with the Department of…