Virgin Born Shark

This is an interesting birth. A hammerhead shark born in captivity in Omaha in 2001 was determined by researchers this week to have only one parent. Tests confirmed no male DNA in the shark. The bizarre biological phenomenon is known as parthenogenesis or virgin birth. It's been seen before in insects, birds, and some smaller fish but never in such a organism as complex as a shark. It has scientist wondering what triggers an organism that is capable of reproducing sexually to turn on the ability to conceive on its own. These are the days my friend.
Jim "Train"