When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Scientists have finally recreated the initial steps of HIV infection in a test tube, offering an ...

The human eye, says Biology Professor George Wald of Harvard, is like a camera, with a slow film for bright light and a fast film for dim light. At a Cleveland meeting of the Society of Biological ...

Though they abound in detective fiction, police toxicologists are rare in the U. S. When the police of almost any big city want to know what poison was used or what drug taken in a puzzling crime, ...