蓝色起源完成全女性太空飞行任务 凯蒂·佩里等六人突破卡门线
杰夫·贝索斯旗下蓝色起源公司于4月14日成功执行NS-31亚轨道任务，搭载六名女性乘员完成10分钟太空飞行，这是继1963年苏联宇航员捷列什科娃后首个全女性太空任务。
乘组包括歌手“水果姐”凯蒂·佩里（Katy Parry）、CBS主播盖尔·金、以及贝索斯未婚妻劳伦·桑切斯等六人。任务使用“新谢泼德”（New Shepard）可回收火箭系统，飞行高度突破100公里卡门线（即国际公认的太空边界），乘员舱配备定制化女式航天服。
蓝色起源迄今已完成11次载人飞行，单座票价起价15万美元。
NPR | 新华网
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Bitcoin is built on a distributed digital record called a blockchain. As the name implies, blockchain is a linked body of data, made up of units called blocks that contain information about each and every transaction, including date and time, total value, buyer and seller, and a unique identifying code for each exchange. Entries are strung together in chronological order, creating a digital chain of blocks. “Once a block is added to the blockchain, it becomes accessible to anyone who wishes to view it, acting as a public ledger of cryptocurrency transactions,” says Stacey Harris, consultant for Pelicoin, a network of cryptocurrency ATMs. Blockchain is decentralized, which means it’s not controlled by any one organization. “It’s like a Google Doc that anyone can work on,” says Buchi Okoro, CEO and co-founder of African cryptocurrency exchange Quidax. “Nobody owns it, but anyone who has a link can contribute to it. And as different people update it, your copy also gets updated.”
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