Podcast:This Week in Microbiology Published On: Sat Sep 26 2015 Description: The TWiM team wonders why definitions in biology often change, and discuss how the small molecule terrein is important for the growth of a soil fungus. Image: Lesion formation on banana surfaces infected with Aspergillus terreus. Source Links mentioned: ASM Undergraduate Research Capstone Program ASM Undergraduate Fellowship Program Regulation of terrein production in Aspergillus terreus Visit microbeworld.org/twim for more.