What began as a daring scuba adventure in the Maldives ended in horror this week after five Italian tourists never resurfaced from a deep-water cave expedition. Officials are scrambling to determine ...

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 ...

My bedroom has become a sleep lab filled with smart rings, fitness bands, and mattress covers. Here's what I learned.

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