NatureProgramming fracture resistance in metamaterials via elastic instabilitiesYujia WangYangchengyi LiuKunlin WuXuan ZhangHanzheng XingSongyan ZhangChanghong LinghuYifan WangXiaoyan LiHuajian Gao2026-07-15Full textDOI https://doi.org/10.1038/s41586-026-10804-0