ejdj1011

ejdj1011 t1_j68ab3a wrote

Essentially, differences in the force that binds the atoms / molecules of a material together.

This is due to a combination of subatomic forces and the structure of the material. For example, strain in metals is due to the crystal structure "realigning" itself, one atom at a time. Doing so fills atomic-scale voids and fixes other defects in the structure. Eventually, you run out of such defects, and the stress is instead applied to the crystal bonds themselves. Breaking these bonds breaks the material.

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ejdj1011 t1_iue67ja wrote

Yeah, but the way their optical perception is wired, they still have worse color perception than humans. Basically, each cone (color sensor) a mantis shrimp has only sees a very narrow band of wavelengths. If a mantis shrimp has 15 cones, it can basically only see 15 specific colors. So while humans only have 3 cones, they overlap heavily and our brains can process the ratio of signals to mix colors.

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