Peter Del Tredici

Peter Del Tredici is senior research scientist at the Arnold Arboretum of Harvard University, where lie has worked since 1979. He is also a lecturer at the Harvard Graduate School of Design, where he teaches courses on plants, soils, and urban ecology.

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Recent Stories

After centuries of moving through the Irish countryside, a group known as Travellers has come to rest.

Algae, plants and humans: three groups of organisms that used chemistry to change the planet.

Peaks protected fifty years ago by the Wilderness Act no longer keep mountain goats safe from human impact.

By the 1920s, California had lost all of its grizzly bears—once considered a distinct species and an emblem of the state.