Scientists examining the deaths of female desert tortoises in Southern California said it appears the animals died while exhausting their water and energy to lay eggs during California's historic drought.
Researchers want to know why female tortoises are dying in greater numbers than males in the Joshua Tree National Park.
U.S. Geological Survey biologist Jeffrey Lovich said he believes the tortoises died during a desperate attempt to fight extinction. He called it an "evolutionary gamble" — choosing to try and reproduce despite harsh conditions.
"Females will go out of their way to produce a clutch of four or so eggs," Lovich told The Associated...