New results show that land-living crabs, descended from marine ancestors, have re-invented key aspects of the insect nose through evolution in order to solve the problem of olfaction in their air-filled terrestrial environment.
The robber crab, Birgus latro, is the world’s largest land-dwelling arthropod, with a weight reaching 4 kg and a length of more than half a meter. Robber crabs are perhaps most famous for their ability to climb tall palm trees in search of coconuts, which
Mayo Clinic researchers have identified a previously unknown form of muscular dystrophy, a group of genetic diseases characterized by progressive weakness and muscle degeneration. This newly identified form develops after age 40 and causes heart muscle damage, limb muscle weakness and nerve damage. The researchers have named the newly defined disorder “zaspopathy” (Zas-PO-path-ee).
Some 50,000 Americans have some form of muscular dystrophy, and there are currently no cures. M
Parasitic diseases, especially leishmaniases and trypanosomiases, kill hundreds of thousands of people every year in the world, mainly in the countries of the South. The most severe form of leishmaniosis (kala-azar, the visceral form), induced by Leishmania donovani and L. infantum, affects about 500 000 people per year and proves fatal if no treatment is given.
Although drugs do exist for treating these diseases, they are not always effective, owing to the appearance of r
Researchers at the Georgia Institute of Technology and Technical University Munch have discovered evidence of a phenomenon that may lead to drastically lowering the cost of manufacturing of materials from plastics to fertilizers. Studying nano-sized clusters of gold on a magnesium oxide surface, scientists found direct evidence for electrical charging of a nano-sized catalyst. This is an important factor in increasing the rate of chemical reactions. The research will appear in the 21 January, 2
Newly published North Carolina State University research into the evolution of birds shows the first definitive fossil proof linking close relatives of living birds to a time when dinosaurs roamed the earth.
Research by paleontologist Dr. Julia A. Clarke, an assistant professor in the marine, earth and atmospheric sciences department at NC State, and colleagues provides unprecedented fossil proof that some close cousins to living bird species coexisted with dinosaurs more than
Although mass is the most important property of stars, it has proved very hard to measure for the lowest mass objects in the universe. Thanks to a powerful new camera, a very rare, low-mass companion has finally been photographed.
The discovery suggests that, due to errors in the models, astronomers have overestimated the number of young “brown dwarfs” and “free floating” extrasolar planets. An international team of astronomers lead by University of Arizona Associate Professor La