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

57:46
May 9, 2025 - PBS News Hour full episode

57:46
May 8, 2025 - PBS News Hour full episode

57:46
May 7, 2025 - PBS News Hour full episode

57:46
May 6, 2025 - PBS News Hour full episode

57:46
May 5, 2025 - PBS News Hour full episode

26:45
May 4, 2025 - PBS News Weekend full episode

26:44
May 3, 2025 - PBS News Weekend full episode

56:45
May 2, 2025 - PBS News Hour full episode

56:42
May 1, 2025 - PBS News Hour full episode

56:44
April 30, 2025 - PBS News Hour full episode

56:45
April 29, 2025 - PBS News Hour full episode

56:45
April 28, 2025 - PBS News Hour full episode