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if mammals lost their colour vision during their tree scurring days
at night, then what need did they have for bright colours then either.
it would make sense that they would have lost the enzymes to produce 
bright skin colours .

Bonnie Blackwell,                               bonn@qcvaxa.acc.qc.edu
Dept of Geology,                                (718) 997-3332
Queens College, City University of New York,    fax:  997-3349
Flushing, NY 11367-1597