Mathematically modeling HIV drug pharmacodynamics

3-D rendering of a colony of pathogen viruses. Credit: frenta / Masterfile 37 million people around the world today live with Human Immunodeficiency Virus (HIV), which is responsible for roughly 1.1 million deaths caused by AIDS-related conditions. The virus replicates by inserting itself into the genetic code of CD4+ memory T-cells, human immune cells essential…

Scientists see order in complex patterns of river deltas

The world’s river deltas come in many complex and diverse patterns, as demonstrated by those depicted above (from top to bottom, left to right): the Lena (Russia), Mossy (Canada), Ebro (Spain), Niger (Nigeria), Amazon (Brazil), Ganges-Brahmaputra-Meghna (Bangladesh and India), Mekong (Vietnam), Wax Lake (Louisiana), Colville (Alaska), Parana (Argentina) and Mississippi (Louisiana) deltas. Yet nearly all…