Are there Many Worlds? Does Time Exist? Are We Alone?  Hosted by Director of Sciences Janna Levin, the Scientific Controversies series  brings creative minds together to celebrate the passionate spirit of scientific curiosity.  Previous guests include Nobel Laureate Frank Wilczek, geneticist George Church, and neuroscientist Christof Koch with subjects ranging from artificial intelligence and string theory, to dark matter, consciousness, and other unsolved scientific quandaries.