Anna's Hummingbird Chirps With Its Tail During Display Dives:
The beeps, chirps and whistles made by some hummingbirds and thought to be vocal are actually created by the birds' tail feathers, according to a study by two students at the University of California, Berkeley.
Why Don't Chimpanzees Like To Barter Food?:
For thousands of years, human beings have relied on commodity barter as an essential aspect of their lives. It is the behavior that allows specialized professions, as one individual gives up some of what he has reaped to exchange with another for something different. In this way, both individuals end up better off. Despite the importance of this behavior, little is known about how barter evolved and developed.
Black Death Selective In Its Wrath: Plague Targeted The Weak, Frail:
Despite the long-held assumption by historians that Europe's Black Death of 1347 to 1351 killed indiscriminately, a new report by University at Albany anthropologist Sharon DeWitte and Pennsylvania State University researcher James Wood finds that the deadly plaque targeted the already ill and weak.
Ecological Genetics Of Freshwater Bacteria Surveyed:
Novel molecular techniques have been responsible for major strides in microbial ecology and are addressing broadly important scientific questions about the variety and distribution of microbial life, according to a new article.
Revolution In Understanding Of Ion Channel Regulation:
A study at Rush University Medical Center in Chicago proposes that bubbles may control the opening and closing of ion channels. This new understanding of the channels that control much of life in health and disease provides a vital piece of the molecular puzzle.
Lost City Pumps Life-essential Chemicals At Rates Unseen At Typical Deep Ocean Hydrothermal Vents:
Hydrocarbons -- molecules critical to life -- are being generated by the simple interaction of seawater with the rocks under the Lost City hydrothermal vent field in the mid-Atlantic Ocean.
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