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

A nation is deļ¬ned by what it preserves.

The way they live, the food they eat, and the effect on us

A true but unlikely tale

Story and Photographs by William Rowan

Increasing day length on the early Earth boosted oxygen released by photosynthetic cyanobacteria.