Johns Hopkins Magazine -- April 1998
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APRIL 1998
CONTENTS

RETURN TO ANCIENT MICRO WORLDS

AUTHOR'S NOTEBOOK

S C I E N C E    A N D    T E C H N O L O G Y

Ancient Microworlds
Photography by Norman Barker and Giraud Foster


Over millions of years, mineral deposits (yellow filaments) have replaced the spongy marrow of this Jurassic-era dinosaur bone.


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