“…For example, bamboo (Amada & Untao, 2001; Wegst, 2011), horn (B.‐W. Li, Zhao, & Feng, 2011; Y. Zhang, Huang, Hayashi, Gatesy, & McKittrick, 2018), sheep horn (Drake et al, 2016; Johnson et al, 2017), bone (X. Li et al, 2013; Libonati & Vergani, 2016), beetle elytra (Chen, Zu, Wu, Xie, & Tuo, 2015; Taylor, Bauer, Poland, & Windell, 2010), shell (Boufala et al, 2019; Ji, Li, & Chen, 2018), and pomelo peel (Thielen, Speck, & Seidel, 2015; W. Zhang, Yin, Yu, & Xu, 2019). Currently, there have been extensive studies on the relationship between their structure and mechanical properties.…”