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一 | While scientists and science fiction authors alike have long dreamed of sending crewed missions to Mars, a new study suggests these plans may hit a snag – a big one.,The authors of a yet to be peer-reviewed study argue that the participants of such a mission to Mars would end up being exposed to radiation – namely, to “energetic charged particles from Galactic and Solar origin” – both while in transit and while on the planet itself, with the “thin spacecraft shield” and “rarefied Martian atmosphere” offering little in the way of protection.,The research team attempted to gauge the impact of a simulated 1,000-day mission to Mars on various organs of the human body, and concluded that astronauts may be exposed to radiation doses above one Sievert, which is over the safe limit set by most space agencies, New Scientist points out.,“We suggest mitigation strategies such as improved ways of shielding and dietary supplements, and make recommendations for the safety of astronauts in future crewed missions to Mars,” the team wrote in the abstract of their work available on the arXiv preprint server.,Ideas about how astronauts may be protected from radiation during a mission to Mars have already been proposed, such as the concept of a radiation shield comprised of a fungus found growing at the Chernobyl Nuclear Power Plant.,Last year, one architecture studio even unveiled a project for a self-sufficient and sustainable city that would be built on the red planet itself.。 “建德故事·AI创想”短视频创作大赛日前正式启动，大赛以“建德故事·AI创想”为主题，以AIGC技术为创作工具，面向全国AI创意爱好者征集作品。要求将建德的历史文化、山水风光、非遗传承、美食风味、美丽乡村、城市风貌等特色资源转化为具有视觉冲击力与传播力的数字影像作品，鼓励以年轻化、故事化、影视化的表达方式讲好建德故事，加速推动建德城市文化品牌的传播与影响力提升。大赛要求以建德为核心创作题材，作品须借助AI工具辅助制作，成片时长3~5分钟，投稿截止时间：8月28日。大赛设一等奖1名（奖金4万元）、二等奖1名（奖金2万元）、三等奖3名（奖金5000元），另设优秀奖5名（奖金1000元）。识别二维码查看比赛细则。