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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.
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Israel's Prime Minister says the intense phase of the war in Gaza will end soon as Israel and the U.S. argue over weapons deliveries.
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After Claudia Sheinbaum becomes the first woman to win Mexico's presidential election, a look at what that means for U.S. relations.
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"PBS NewsHour" asks NATO’s Secretary General if the delayed U.S. aid to Ukraine is too late to make a difference.