Don't miss the big stories. Like us on Facebook. Beneath the forest canopy, or overstory, of towering trees is a second layer of vegetation known as the understory. It is composed of shrubs, saplings, ...
Scientists have known for some time that trees not only have a sex, but can sometimes switch between sexes. But they haven’t always known why. Now, as The Washington Post’s Amy Ellis Nutt reports, a ...
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