A new study of the Hadza population in Tanzania, forthcoming in the April 2006 issue of Current Anthropology, explores the role of hunting in human evolution. Among chimpanzees and most human populations that subsist on wild resources, hunting is a predominantly male activity, and researchers have long tried to locate the advantage that hunting, a dangerous and tiring activity, brings to men. Though some have argued that good hunters have longer-lasting ties to mates and better-fed offspring, other research suggests that hunting provides an opportunity to garner social attention and increase ones mating prospects, also known as the "showoff hypothesis."
"When asked where they would like to reside, [Hadza] women preferred the camp of good hunters, where more food would be shared with their families," explains Brian M. Wood (a graduate student in biological anthropology at Harvard University). "The choice was not so clear for [Hadza] men: living with bad hunters would showcase their own hunting prowess. Living with good hunters, however, would bring more food to their family, at the cost of lowered relative hunting status."
In a similar study of the Ache hunter-gatherers in eastern Paraguay, also published in Current Anthropology, Wood revealed that a man without dependent offspring is more concerned about his individual prestige as a hunter, and would therefore rather reside among poorer hunters, while one with children, more concerned about access to food, prefers to be with better hunters. However, most participants in the Hadza study opted for a living situation that provided a better flow of nutrients to the household.
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03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)
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Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
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