Bioengineers are creating human body parts to replace organs and manage life-threatening diseases. How techniques like 3-D printing and stem cell research are driving medical advances and raising ethical questions
Diane talks with Elizabeth Doyle, the founder of Yankee Clippers, an unusual horticultural service that specializes in hand-pruning trees, shrubs, vines, and evergreens.
- Elizabeth Doyle founder of Yankee Clippers
- Adrian Higgins gardening editor for the "Washington Post"
- Tom Tyler extension agent for Arlington County, Virginia, and author of "The Indiana Gardener's Guide"
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