The sperm whale is  able to survive such crushing depths through the evolution of a rib cage made of flexible cartilage  instead of bone, which allows the collapse of the lungs to a minute size on its long way down.

抹香鲸之所以能在如此深的水下生存， 是因为它进化出了由柔韧的软骨而不是骨头构成的胸腔，这使得它在下沉的过程中， 肺部可以塌缩到微小的尺寸。