Season 3 · Episode 23 of 39
Aired Jul 30, 2019
How Earth's First, Unkillable Animals Saved the World
Tue, Jul 30, 2019
0 of 39 watched this season
They have survived every catastrophe and every mass extinction event that nature has thrown at them. And by being the little, filter-feeding, water-cleaning creatures that they are, sponges may have saved the world.
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Airs
Tue, Jul 30, 2019
Show
PBS Eons
246 episodes
Episode
S3 · E23
in PBS Eons