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Spring and tree pollens peak at different times as the year progresses. But they are both spreading northward across the U.S. as May begins. Tree pollen is about to get worse in cities like New York, ...

Imagine trying to tell identical twins apart just by looking at their fingerprints. That's how challenging it can be for scientists to distinguish the tiny powdery pollen grains produced by fir, ...

Add Yahoo as a preferred source to see more of our stories on Google. Spring is a beautiful time in Alabama, but not everyone enjoys it. If your eyes are watering and you can’t stop sneezing, you’re ...