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"Some of their unique adaptations make painted turtles an interesting model for biomedicine. But they remain understudied because it's difficult work to do. The idea here is to eliminate that bottleneck," Valenzuela said.

Researchers subjected the skeletal remains of pond sliders, diamondback terrapins, painted turtles and box turtles to incremental increases in mechanical forces and measured where and how the shells began to buckle.

For decades, pet red-eared slider turtles have been abandoned in city ponds, creating a major nuisance that has crowded out local painted turtles and fueled algae blooms.

For decades, pet Red-eared slider turtles have been abandoned in city ponds, creating a major nuisance that has crowded out local painted turtles and fueled green algae blooms.

In addition to threatened spiny softshell turtles, these nest sites are also used by map turtles, painted turtles and snapping turtles.