NEW YORK -- A fossil find in Argentina has revealed a two-legged creature that's the most primitive snake known, a discovery that promises to fire up the scientific debate about whether snakes evolved ...

NEW YORK — A fossil find in Argentina has revealed a two-legged creature that’s the most primitive snake known, a discovery that promises to fire up the scientific debate about whether snakes evolved ...

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NEW YORK — A fossil find in Argentina has revealed a two-legged creature that’s the most primitive snake known, a discovery that promises to fire up the scientific debate about whether snakes evolved ...