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professors named top young innovators  Two Princeton engineering
faculty have been named to Technology Review Magazine's list of
the top 35 young innovators for 2010.  Celeste Nelson, an
assistant professor of chemical and biological engineering, and
Michael McAlpine, an assistant professor of mechanical and
aerospace engineering, were include in the magazine's annual
TR35 list of innovative researchers under the age of 35.  The
magazine lauded Nelson for her research into how organs such as
the lungs or kidneys develop the complex branching structures of
their internal anatomy.  Nelson developed a laboratory technique
for growing structures from simple shapes that mimics the
process by which embryonic tissue develops into organs. She
found that the initial shape of the structure played an
important role in how molecules communicate with each other and
the final patterns that develop.  "Other researchers had
previously theorized that geometry matters i