Scientists are starting to understand why cigarette smoke causes cancer . The aromatic hydrocarbon receptor is the culprit. A new method for making transgenic animals . The journal article is in PNAS World wide HIV infection is still rising. I wish everyone followed these guidelines.
Biological weapons are the poor countries weapon of mass destruction.
The world needs to find ways to prevent their development and this effort is a start. This transfer had to happen by the genes jumping and not sex or evolution. Scientists find the meteorite that killed the dinosaurs. The southern region of the United States has the highest rate of HIV infection . There was a low prevalence of perceived risk in individuals before infection.