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


Ancient stromatolites (algae) oxidized iron in seas 2.1 billion years ago. In fossilized form, they appear as swirls of red and silver.


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