Understanding Astrobiological False Positives from Terrestrial Microbiology

Explore the intricacies of astrobiological false positives through the lens of terrestrial microbiology in this 32-minute lecture by Prof. Martin Homann from University College London. Delivered as part of the Keck Institute for Space Studies short course "Parameters for Biological Validation," delve into key concepts such as biosignatures, false positives, and lines of evidence in the search for extraterrestrial life. Examine fossil biosignatures and microbial mats, learning where to find them and how to distinguish between different types. Investigate specific geological formations like the Barberton Greenstone Bed, Coastal Parliament, Mendonite, and Moodys Group through field images. Gain insights into the morphology of these structures and understand the differences between fluvial and marine mats, enhancing your knowledge of astrobiological research techniques and challenges.

Introduction
Biosignatures
What are false positives
What are lines of evidence
Fossil biosignatures
Microbio mats
Where can we find them
Barberton Greenstone Bed
Coastal Parliament
Mendonite
Moodys Group
Field Images
Morphology
Fluvial vs Marine mats