EPISODE · Feb 4, 2026 · 1 MIN
How Many Microbes Live on Earth? | Peter Girguis
from Particles of Thought · host GBH
Sorry, Beyoncé, it turns out microbes rule the world. Microbiologist Peter Girguis explains how to conceptualize just how many microbes are on Earth… and how understanding this helps us look for life on other worlds. For more, check out the extended interview with Peter Girguis.Learn more about NOVA and subscribe to our YouTube channel.
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How Many Microbes Live on Earth? | Peter Girguis
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