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	Podcast:		NOVA Now
	Episode:		The Air You Breathe Is Bacteria Poop \| Peter Girguis
	Category:		Science & Medicine
	Duration:		00:01:23
	Publish Date:		2026-04-22 10:00:00
	Description:		Long before trees and grass, microbes were shaping our atmosphere. Evolutionary biologist Peter Girguis explains how ancient bacteria learned to split water for energy, and why their waste product changed Earth forever. For more, check out the extended interview with Peter Girguis. Learn more about *NOVA* and subscribe to our *YouTube* channel.
	Total Play:		0