NASA滞留宇航员成功返回地球
在经历了286天计划外太空任务后，NASA宇航员布奇·威尔莫尔和苏尼·威廉姆斯于本周二结束创纪录的9个月太空滞留，搭乘SpaceX龙飞船安全降落在墨西哥湾。NASA连续推迟返回时间表，最终选择切换到SpaceX作为救援方案。考虑到本周晚些时候的不稳定天气，NASA提前让他们启程。
两位宇航员的太空飞行历程创造多项记录：累计行程1.95亿公里（1.21亿英里），完成4,576次地球轨道运行，威廉姆斯更以62小时太空行走刷新女宇航员累计时长记录。在延长期内，他们转型为正式空间站成员，承担设备维修、科学实验等任务，威廉姆斯还担任过空间站指挥官。
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A spike in interest rates since the start of the year has accelerated a rotation out of high-growth technology stocks and into value stocks poised to benefit from a reopening of the economy. The Nasdaq has fallen more than 10% over the past month as the Dow has soared to record highs, with a spike in the 10-year US Treasury yield acting as the main catalyst. It recently surged to a cycle high of more than 1.60% after starting the year below 1%. But according to Jim Paulsen, the Leuthold Group's chief investment strategist, rising interest rates do not represent a long-term threat to the stock market. Paulsen expects the 10-year yield to cross 2% by the end of the year. A spike in interest rates and its impact on the stock market depends on the economic backdrop, according to Paulsen. Rising interest rates amid a strengthening economy "may prove no challenge at all for stocks," Paulsen said.
Like a stock, you can buy and hold Bitcoin as an investment. You can even now do so in special retirement accounts called Bitcoin IRAs. No matter where you choose to hold your Bitcoin, people’s philosophies on how to invest it vary: Some buy and hold long term, some buy and aim to sell after a price rally, and others bet on its price decreasing. Bitcoin’s price over time has experienced big price swings, going as low as $5,165 and as high as $28,990 in 2020 alone. “I think in some places, people might be using Bitcoin to pay for things, but the truth is that it’s an asset that looks like it’s going to be increasing in value relatively quickly for some time,” Marquez says. “So why would you sell something that’s going to be worth so much more next year than it is today? The majority of people that hold it are long-term investors.”
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