According to several worrisome studies presented here last week at the annual meeting of the American Society of Tropical Medicine and Hygiene, resistance against artemisinin-based combination therapies, the gold standard in fighting malaria, seems to be developing in western Cambodia, along the Thai border.
In the wake of severe fighting in Virunga National Park in the Democratic Republic of the Congo, worried rangers began a painstaking census late last month of the park's highly endangered mountain gorillas, nearly a third of the world's known population.
Multiple lines of evidence have shown that the isotopic composition and concentration of calcium in seawater have changed over the past 28 million years. A high-resolution, continuous seawater calcium isotope ratio curve from marine (pelagic) barite reveals distinct features in the evolution of the seawater calcium isotopic ratio suggesting changes in seawater calcium concentrations.
Dense plants are taking over grasslands in many areas; researchers in the U.S. Southwest are studying how they tap into water supplies--and how to keep them in check.
The axolotl, a salamander that retains unique evolutionary features and is a darling of biologists because it can regenerate limbs, faces adversity on two fronts.
The World Health Organization has published a provocative model that explores the possibility of "eliminating" the HIV epidemic by annually testing everyone on a voluntary basis and treating all infected people, regardless of their clinical status.
A team of epidemiologists has reported that just one-fifth of the standard meningitis vaccine dose triggers an immune response almost as good as that of the full dose, offering a way to potentially stretch limited supplies.
