Poor mothers will invest more resources in daughters, who stand a greater chance of increasing their status through marriage than do sons, suggests a study in the American Journal of Physical Anthropology.
Social Sciences
Jun 21, 2012
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More than half-a-century ago, the Dutch theoretical physicist Hendrik Casimir calculated that two mirrors placed facing each other in a vacuum would attract. The mysterious force arises from the energy of virtual particles ...
General Physics
Apr 18, 2012
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Porous ceramic water filters are often coated with colloidal silver, which prevents the growth of microbes trapped in the micro- and nano-scale pores of the filter. Other metals such as copper and zinc have also been shown ...
Bio & Medicine
May 24, 2012
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Endocasts are the most direct evidence for studying human brain evolution. Endocasts can provide information on brain size, general shape, morphology, and anatomical features of the external surface. Dr. WU Xiujie, Institute ...
Archaeology
Jun 22, 2011
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