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科技圈🎗在花频道📮

1900名美国院士拉响警报：科研界遭遇"特朗普风暴"

当地时间3月31日，众多美国顶尖科学家在网上发出了一封公开信：呼吁特朗普政府停止对美国科学的全面攻击。

这封公开信由来自医学、流行病学、心理学、气候科学、社会学和经济学等领域的13位科学家起草。签名科学家均为美国国家科学院、工程院和医学院的成员，其中包括Harvey J. Alter、Francoise Barre-Sinoussi、Reinhard Genzel、Edvard I. Moser、May-Britt Moser等十多位诺奖得主。

院士们警告，美国可能丧失在医疗创新、清洁能源等领域的领导地位，他国民众健康水平与经济实力将全面超越美国。与此同时，哥伦比亚大学等政府盯上的院系，面临联邦资金断供威胁，凸显高校独立研究空间遭挤压。

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Create: 2025-04-02
Last Update: 2025-05-06 05:34:43

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在花软件新闻投稿频道 Telegram | DID YOU KNOW?

Telegram and Signal Havens for Right-Wing Extremists

Since the violent storming of Capitol Hill and subsequent ban of former U.S. President Donald Trump from Facebook and Twitter, the removal of Parler from Amazon’s servers, and the de-platforming of incendiary right-wing content, messaging services Telegram and Signal have seen a deluge of new users. In January alone, Telegram reported 90 million new accounts. Its founder, Pavel Durov, described this as “the largest digital migration in human history.” Signal reportedly doubled its user base to 40 million people and became the most downloaded app in 70 countries. The two services rely on encryption to protect the privacy of user communication, which has made them popular with protesters seeking to conceal their identities against repressive governments in places like Belarus, Hong Kong, and Iran. But the same encryption technology has also made them a favored communication tool for criminals and terrorist groups, including al Qaeda and the Islamic State.

How Does Bitcoin Work?

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.”