科学家利用犀牛角中的放射性同位素帮助海关人员抓捕偷猎者。 Scientists use radioactive isotopes in rhino horns to help customs agents catch poachers.

南非科学家正在使用新方法,用无害放射性同位素注入角,打击偷猎犀牛的行为。 Scientists in South Africa are using a new method to fight rhino poaching by injecting horns with harmless radioactive isotopes. 由Witwatersrand大学开发的里索托普项目使角可在机场和边境探测,帮助海关人员抓获偷猎者。 The Rhisotope Project, developed by the University of the Witwatersrand, makes the horns detectable at airports and borders, helping customs agents catch poachers. 该项目旨在保护不断下降的犀牛人口,从20世纪初的大约500 000头下降到全球约27 000头。 The project aims to protect the declining rhino population, which has dropped to around 27,000 globally from about 500,000 at the start of the 20th century. 对20只犀牛的试验表明,同位素是安全有效的。 Trials on 20 rhinos showed the isotopes are safe and effective.