“…Biological structures have inspired synthetic materials with unparalleled performances such as ultra-lightweight design [1,2,3,4], tunable elasticity [5,6,7,8,9], and negative poisson's ratio [10,11,12,13,14]. Among biological structures, scales had appeared in the earliest stages of evolution of complex multicellular life [15] and continued their existence in spite of millions of years of evolutionary pressures.…”