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.

HARTFORD, CT. — The Hartford Yard Goats rallied for a late run and stole a 4-3 win from the Curve on Tuesday night at Dunkin Park. Altoona took the first lead of the game when Ivan Brethowr drove home ...