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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