Back to Show
PBS News Hour
The phytoplankton that brought Earth to life
Without the "billion billion billion" Prochlorococcus, a plant-like bacteria in the ocean, Earth would not have the oxygen we breathe today. But the more scientists study about these diverse organisms, the less they know, says Penny Chisholm, an oceanographer at MIT.
Sign up now for inspiring and thought-provoking media delivered straight to your inbox.
Support Provided By

24:09
May 31, 2025 - PBS News Weekend full episode

56:34
May 30, 2025 - PBS News Hour full episode

57:46
May 29, 2025 - PBS News Hour full episode

57:46
May 28, 2025 - PBS News Hour full episode

57:46
May 27, 2025 - PBS News Hour full episode

57:46
May 26, 2025 - PBS News Hour full episode

26:45
May 25, 2025 - PBS News Weekend full episode

26:45
May 24, 2025 - PBS News Weekend full episode

57:46
May 23, 2025 - PBS News Hour full episode

57:46
May 22, 2025 - PBS News Hour full episode

57:46
May 21, 2025 - PBS News Hour full episode

57:46
May 20, 2025 - PBS News Hour full episode