"Human movements like hopping and running are often characterized by a spring-mass model, where the leg acts as a spring supporting the body mass as it bounces off the ground," said Takeshita.

Police confirmed a "lower leg of a dark-skinned human being" was found on Tuesday ... to contact police on 131 444 and quote reference 10020603. Doctors in Gaza have lost nine of their ten ...

Like in an animal or human leg, one muscle shortens as its partner lengthens. These precise, rapid shifts in muscle size and shape are critical to successfully moving across an environment.

The first human leg was found on the shoreline on Wednesday by 800 block of Paseo Del Mar—the same point where a boat used by two missing fishermen washed up earlier in the week, per the Times.