  More than 40 years have passed since Ed Salpeter and others predicted that
the carbon/oxygen cores of the coolest white dwarf stars in our Galaxy will
theoretically crystallize. This effect has a dramatic impact on the calculated
ages of cool white dwarfs, but until recently we have had no way of testing the
theory. In 1992, pulsations were discovered in the massive potentially
crystallized white dwarf BPM 37093, and in 1999 the theoretical effects of
crystallization on the pulsation modes were determined. Observations from two
Whole Earth Telescope campaigns in 1998 and 1999, combined with a new
model-fitting method using a genetic algorithm, are now giving us the first
glimpse inside of a crystallized star.
