Deep inside metal drums of liquid nitrogen at the University of Michigan might be the key to a replacement heart valve for 9-year-old Will Marzolf.
Or the formula for treating the Huntington’s disease that killed Krissi Putansu’s grandfather and uncle and now threatens her mother.
Or the clues to protecting Marlene Goodman’s great-children from the genetics that have curled her fingers to useless angles. …
