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Dark, isolated and largely unexplored, caves help astronauts prepare to do extra-terrestrial science

Through his non-profit, TED Fellow Alexander McLean works to bring hope to men, women and children in prison in Kenya and Uganda. He talks about his work to change lives through healthcare, education, and access to justice.

Architect Chris Downey on how he readjusted to life in San Francisco — its streets, its sounds, its community — after losing his sight.

Women’s perspectives matter — but with movie casts and crews dominated by men, Hollywood has long suggested otherwise. One way to fix this: support female filmmakers. Here’s a curated list of picks from writer, actor and activist Naomi McDougall Jones.

气候变化导致极端天气频发，给全球农业带来严峻挑战。文章介绍了四种重新被发掘的古老农业智慧，包括越南湄公河三角洲的”浮水稻”种植法，展示了祖先的传统方法如何在21世纪帮助人类适应气候变化，为现代农业提供新的解决思路。

The strange behavior of Tabby’s Star, or KIC 8462852, has inspired modern astronomy’s wildest guessing game, with explanations ranging from aliens to sunspots. Writer Stephen Petranek got Tabby herself to assess the competing ideas.

伍兹霍尔海洋研究所深海机器人”涅柔斯”号在执行探索克马德克海沟任务时神秘失联，彼时它已在水下作业七小时，距任务完成仅剩两小时。科学家们推测，这台机器在距海面约10公里的深处发生了内爆，令人扼腕。

Kio Stark loves to talk to strangers — but she knows every exchange started is one that must be ended. Here, she shares how to gracefully step away.

The planet is in peril, and the time to act is now. Meet 8 TED Fellows who are spreading the message through their art.

在伊拉克和叙利亚，已有逾百万人因伊斯兰国武装分子而流离失所。这一危险的圣战组织又称IS、ISIS或ISIL。本文精选三篇深度资料，分别从威胁性质、崛起背景及其统治实态三个角度，帮助读者全面了解这一极端组织。