Scientists say that humans have a biased view of the most repugnant insect - the cockroach. Not all species of cockroaches are pests. In fact, these group of insects have a diversity of forms, and some are used for medicinal purposes. Although cockroaches can withstand up to 10 times more radiation than humans, they are not immune to it.
George Beccaloni, curator of orthopteroid insects at the Natural History Museum in London, said only 30 of the known 5,000 species have pest-like tendencies. He explained that these insects live in many diverse environments, so they come in various shapes and sizes.
Cockroaches have also been a preferred subject for science research and experiments. Their exoskeletal wings have inspired several robot designs. For years now, scientists have also been studying cockroach legs to design human prosthetic legs.
It is through the study of their biological make-up that scientists were able to discover that cockroaches do have a weakness; radiation. Beccaloni told BBC News that "Cockroaches are only about five times more resistant [than humans]," when hit outright by 10 grays of radiation. Other species can survive ten times as intense as that which makes rank the lowest in terms of radiation tolerance for insects.
bias：名詞、動詞，偏見。例句：Good managers have a bias for action.（優秀經理人偏好實際行動。）
prefer：動詞，選擇（與…相比）。例句：I always prefer to believe the best of everybody, it saves so much trouble.（我總選擇相信人之為善，這讓我省事很多。）
survive：動詞，存活、倖存。例句：To live is to suffer, to survive is to find some meaning in the suffering.（活著便是受苦，而存活是為了探尋受苦之意義。）