Microscopic ocean algae produce a huge share of Earth’s oxygen—but they need iron to do it. New field research shows that when iron is scarce, phytoplankton waste energy and photosynthesis falters.

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THE high affinity for oxygen possessed by muscle hæmoglobin suggested its use as a very sensitive spectroscopic method for detecting and measuring small quantities of oxygen 1. This method has now ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Here’s what you’ll learn when you read this story: Scattered across an abyssal plain ...

Examine Saldivar’s interpretation of events that ended in Selena Quintanilla Perez’s death and her claims that everything wasn’t as it seemed.

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THE two important paramagnetic gases are oxygen and nitric oxide, and to account numerically for their susceptibilities has long been a puzzle. The new quantum mechanics, together with recent ...