Scars are a public health as well as aesthetic threat, as internal scars can compromise the function of organs and tissues. Scientists are now devising medications that promote healing without producing scars. One of the scientists on the front lines discusses how these medicines work and their possible uses.
Air pollution is blamed for one of every eight deaths worldwide, including 200,000 in the US each year. A noted lung physician discusses some of the diseases smog can cause and ways to keep your lungs safe.