A video podcast documentary by the American Society for Microbiology explores the microbial world and how life has evolved over Earth’s 3.8 billion-year history. Composed of over 42,000 scientists and health professionals, the mission of ASM is to advance the microbial sciences as a vehicle for understanding life processes and to apply and communicate this knowledge for the improvement of health and environmental and economic well-being worldwide. For information about ASM, visit the society on the web at www.asm.org. For more information about the video podcast of Intimate Strangers: Unseen Life on Earth visit www.microbeworld.org.