Chasing fire clouds, and nanoparticles blitz brain cancers

In this week's show, wildfires have now spread to Italy, Canada, and the wine-producing region of France, Bordeaux. These fires produce a peculiar cloud phenomenon called pyrocumulonimbus and scientists plan to fly a jet over these clouds to determine how they operate. Also, we hear how drug-packed nanoparticles can aid brain cancer treatment, the genetic evidence of smallpox in Incan mummies, and…