Abstract Insect eggshells must meet various demands of developing embryos.These demands sometimes conflict with each other; therefore, there are tradeoffs between eggshell properties, such as robustness and permeability.To meet these conflicting demands, particular eggshell structures have evolved in diverse insect species.Here, we report a chiggat
Abstract Background Cluster headache is a primary condition characterized by severe headache accompanied by trigeminal autonomic signs.By definition, it is not attributed to underlying etiologies; however, under certain clinical characteristics, secondary etiologies must be ruled out.Case presentation We present the case of a 48-year-old Hispanic m
In Southwestern China, there exists deep river valleys and abundant rainfall, which leads to a large number of reverse-dip rock slopes.In order to investigate the evolution characteristics of toppling deformation of reverse-dip slope under the influence of rainfall, and a typical reverse-dip slope was taken as an engineering case.Firstly, the tempo