Female sharks can reproduce without having sex, scientists revealed today.
The discovery could have solved a mystery which has baffled experts studying the species in captivity.
Researchers began their investigation following the unexpected birth of a baby hammerhead in an aquarium at the Henry Doorly Zoo in December 2001. Astonishingly, none of the three potential mothers in the tank - all caught in Florida waters as babies - had been exposed to any male sharks during their three years in captivity.
The newborn's DNA only matched up with the mother's - there was none of any male origin.
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