Arsenic is toxic to most life, for a number of reasons. When a NASA-funded scientist announced discovery of bacteria in Mono Lake that not only eat arsenic, but may use it to build their DNA, many scientists were skeptical. I spoke on-air with one skeptic, microbiologist Rosie Redfield, of the University of British Columbia when the announcement was made, and spoke with her again recently, for an update on her work-in-progress, investigating the claim by growing the bugs herself.
I spoke with Prof. Reto Knutti, of the Institute for Atmospheric and Climate Science (Zurich), about modeling the climate in a computer, and about a paper he’s just published, in which his model was fed some rather extreme estimates for the planet’s future population and energy use. Aired on Soundings, 11 July 2011.