translation.en: Now, to wrap this up, I want to talk for two seconds about caves and the human expansion beyond Earth as a natural outgrowth of the work that we do in caves.
translation.zh: 现在来总结一下，我想花几秒钟讲下 洞穴和人类在地球外的扩张之间的关系 作为一项我们在洞穴方面工作的成果