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These Boulders are Alive
Clip: Season 42 Episode 21 | 2m 48sVideo has Closed Captions
Dive down to rare stromatolites—key clues to the evolution of virtually all complex life.
Dive down to rare stromatolites—key clues to the evolution of virtually all complex life.
National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.
![NOVA](https://image.pbs.org/contentchannels/iAn87U1-white-logo-41-7WCUoLi.png?format=webp&resize=200x)
These Boulders are Alive
Clip: Season 42 Episode 21 | 2m 48sVideo has Closed Captions
Dive down to rare stromatolites—key clues to the evolution of virtually all complex life.
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Learn Moreabout PBS online sponsorshipNational Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.