When she was only twelve years old, Mary became the first person to find the almost complete skeletons of several animals that no longer existed on Earth.
VOA: special.2009.05.13
The skeletons have growth rings that represent ocean water conditions at the time.
VOA: special.2009.05.12
Corals have hard, stony skeletons that grow like tree trunks.
VOA: special.2009.05.12
Since the 19th century it has systematically collected all varieties of fossilized skeletons.
VOA: standard.2009.12.08
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