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What Is Mastodon, the Alternative Social Network Now Blocked by Twitter?

Learn everything you need to know about Twitter’s open-source competitor.

Since Elon Musk took control of Twitter on Oct. 27, the social network has been roiled by controversy. First, half the staff was laid off via email, and an ill-advised new implementation of its “blue check” verification system left the site plagued by trolls and fake “verified” accounts. Now, Twitter has banned accounts that Musk promised to protect and suspended several prominent journalists who report on Elon Musk.

Twitters users concerned about changes at the company are looking for other social media options, and the open-source network Mastodon has been a big beneficiary. Mastodon Count, a bot that tracks usage on the network, showed a 400% increase in the rate of new account signups on Dec. 15, when Twitter suspended the journalists who cover Musk.

The growing popularity of Mastodon might partly explain why Twitter is now blocking many links to Mastodon servers and suggesting the URLs are “harmful” or include malware. Twitter has also suspended the official account for Mastodon, prompting a joke from creator Eugen Rochko about never having to check Twitter notifications again.

Read on to see how Mastodon works, how to sign up, and how it compares to Twitter. For more, see how to delete your Twitter account, and get the latest on Twitter’s verification badge plans.

What is Mastodon and how is it different from Twitter?

Mastodon is a free social media service that functions much like Twitter. You can post “toots” (instead of tweets), follow other people and organizations, and favorite (like) and boost (retweet) posts from other people.

Mastodon was created and originally released in October 2016 by Eugen Rochko, the CEO and lone employee of the nonprofit organization Mastodon gGmbH. In May, Rochko explained the service’s oddly named substitute for “tweet.” He says the original button was called “publish,” but a committed supporter promised lifetime support of the Mastodon Patreon account if he would change it to “toot.” (On the iOS and Android apps it says “publish.”)

In an interview with Time Magazine, Rochko said he began developing Mastodon when he realized that “being able to express myself online to my friends through short messages was actually very important to me, important also to the world, and that maybe it should not be in the hands of a single corporation that can just do whatever it wants with it.”

Read more: Mastodon Is No Twitter Replacement

Instead of one town square for everyone, however, Mastodon is composed of thousands of social networks, all running on different servers, or “instances,” that can communicate with each other through a system called the Fediverse. The Fediverse also contains other social networks like PeerTube for videos, Funkwhale for music, PixelFed for photos and NextCloud for files.

Mastodon servers aren’t required to be connected to the Fediverse, In fact, the most famous Mastodon instance is Truth Social, the social network of former US president Donald Trump.

How do I join Mastodon?

The hardest part of Mastodon is getting started. Since there’s no one common Mastodon area for everyone — as with Twitter — you’ll need to register on a specific Mastodon server.

Servers can be based on a geographic location, subject interest, professional background or literally anything an administrator can think of. For example, the folks at dolphin.town are only allowed to post the letter “E,” while the literary buffs at oulipo.social are forbidden from ever using the letter “E” (in honor of OuLiPo writer Georges Perec’s lipogram “La Disparition“).

Two of the biggest Mastodon servers, aka instances, are mastodon.social — the official server of the Mastodon project — and mstdn.social, though both have temporarily paused registrations. Another large general server that I recently joined is mas.to. Other popular Mastodon instances include masthead.social for journalists and fosstodon.org for open-source software.

Don’t worry too much about which server you pick — you can join as many as you want and leave or switch servers at any time. And you can follow people across servers, so picking one doesn’t keep you from communicating with those on other instances.

One good place to find a server to join is the official Mastodon website at joinmastodon.org. The site currently lists about 80 servers that have committed to the Mastodon Server Covenant, an agreement to enforce moderation, make backups of the site and give at least three months warning before ever shutting down an instance.

Each server’s “about” page will tell a little bit about the Mastodon instance and list the server’s rules. If you don’t find a server that you like on joinmastodon.org, you can try other Mastodon directories, such as instances.social, which offers a wizard for picking a server as well as a sortable list of 16,412 instances.

Most Mastodon servers with open registration will only ask for your email address and a password to get started. Once you respond to a verification email, you’re ready to start using Mastodon. Other, more private Mastodon servers may ask you to make a request to join and then wait for an invitation.

How do I use Mastodon?

Like Twitter, Mastodon lets you post short messages to the world or to select people, but instead of tweets, Mastodon posts are called toots. And many of Mastodon’s other features are a lot like Twitter’s, too, with slight differences. Each post is limited to 500 characters (instead of 280), and you can include links, images (JPG, GIF or PNG, up to 8MB), audio files (MP3, OGG, WAV, FLAC, OPUS, AAC, M4A and 3GP up to 40MB) and videos (MP4, M4V, MOV, WebM up to 40MB).

Your posts on Mastodon can be set to be public, only for your followers or completely unlisted from all timelines. You can create polls for your followers and use all your favorite usual emojis, plus custom emojis created for specific servers.

Any post can be marked with an explanatory “content warning” that requires a click before viewing, and Mastodon users take advantage of the feature often.

You can even edit posts on Mastodon. Each version of your toot remains available for review, and people who reblog your post are notified after it’s edited.

Just like Twitter, Mastodon uses hashtags that start with the “#” symbol, such as #Gaming, #Anthropology or #Veganism. Since there’s no algorithm to suggest your posts to nonfollowers, using hashtags to categorize your posts for people who might be interested is even more important than on Twitter.

You can follow any account on Mastodon, whether or not it’s on your own server instance, and the account’s posts will be added to your Home feed in chronological order. Know that for some accounts, you need to request permission to follow them.

Free web apps like Debirdify, Fedifinder and Twitodon can help you find accounts you followed on Twitter that have migrated to Mastodon.

If you don’t want a particular account following you, you can block them just like on Twitter, or you can choose to block an entire server.

Mastodon lets you “favorite” posts, but the favorites count doesn’t appear on timelines — if you want to promote someone else’s posts, you’ll need to “boost” or reblog them. Unlike Twitter, there are no “quote toots” on Mastodon, a deliberate choice to discourage “dunking” on other people’s posts. A separate “bookmark” feature lets you save toots on Mastodon without notifying the account that posted it.

Mastodon does have a feature called Direct Messages, but the name is a little misleading. Rather than providing person-to-person messages, Mastodon’s feature sets the visibility of a post to only the people mentioned in it. In other words, they’re toots that only certain people can see, rather than actual direct messages.

How do the Mastodon timelines work?

Whereas Twitter just has one timeline (sorted chronologically or by “top stories”), Mastodon has three: your Home timeline shows all the posts and reblogs from everyone you follow, your Local timeline shows everything from your own server instance, and your Federated timeline shows all posts from all Mastodon servers on which you follow someone.

Using a web browser, you can set Mastodon to look like Twitter, showing one feed at a time, or you can view multiple feeds and notifications simultaneously (much like Tweetdeck) by selecting “Advanced view” from your Preferences.

Are there any mobile apps for Mastodon?

You bet. Due to the open-source nature of Mastodon, you have a lot of choices for apps on both iPhone and Android.

Your first and easiest option is the official app from Mastodon gGmbH (for iOS or Android), but there are other solid third-party apps. The two most popular alternative Mastodon apps right now are Metatext for iPhone and Tusky for Android.

Mastodon apps for iPhone:

Mastodon apps for Android:

If you do get started with Mastodon, make sure to follow me @peterbutler@mas.to. (And say hello!)

For more about social media and Twitter, follow a timeline of the Elon Musk purchase and read about the big changes that could be in store for Twitter.

Correction, Nov. 7: A previous version of this story incorrectly described Mastodon’s features. Mastodon added the ability to edit posts in March 2022.

Technologies

China indicates rare earths will keep flowing to EU, regardless of U.S. trade deal expiration

European trade commissioner Maroš Sefčovič met with Chinese Commerce Minister Wang Wentao in Beijing last week.

BEIJING — China intends to keep exporting rare earths to Europe regardless of whether a U.S. trade deal with Beijing gets extended past January.

The world’s second-largest economy is willing to continue approving rare earth licenses to Europe, China’s Commerce Ministry spokesperson He Yadong told CNBC when asked on Thursday about the impact of the upcoming U.S. deadline.

Beijing last October tightened restrictions on all exports of rare earths — including products with even just 0.1% of China-sourced rare earths. The move followed a new U.S. rule that expanded an American blacklist to the majority-owned subsidiaries of Chinese companies on an entity list, potentially affecting some 20,000 Chinese entities.

However, both the U.S. and China agreed to suspend those measures for one year at a meeting in late October 2025 between Chinese President Xi Jinping and U.S. President Donald Trump. Ahead of the leaders’ latest summit last month, U.S. Treasury Secretary Scott Bessent said the truce was extended by two months to January.

Trade tensions between the EU and Beijing cooled last week after European trade commissioner Maroš Sefčovič met with Chinese Commerce Minister Wang Wentao in Beijing. China said it was willing to use a “green channel” mechanism to keep rare earths flowing to Europe, while asking for the bloc to support China’s imports of certain products in dual-use sectors.

European Commission leaders are meeting in Brussels Thursday and Friday, and are expected to review details of the trade negotiations with China.

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Technologies

Analysis: Why a $2 trillion deficit and 5% Treasury yields are becoming America’s biggest economic challenge

Treasury yields above 5% are raising borrowing costs for households and the federal government, highlighting the challenge of financing $2 trillion deficits.

Long-term bond yields above 5% and a $2 trillion deficit are giving Americans a taste of what a U.S. debt crisis would be like. A true emergency would hurt much more, and isn’t baked in. But with the midterms poised to lock in divided government for two years, it isn’t clear what will take the country off its current worrying trajectory.

Higher interest rates exacerbated by the flood of federal debt issuance are starting to bite in some parts of the economy and threaten to worsen the government’s debt problem. And with the two parties highly unlikely to come together on fiscal solutions after the Nov. 3 midterms, any fixes are years off in the future.

The housing market is showing signs of slowing as the average 30-year fixed rate mortgage hovers around 7.5%. Pending home sales dropped 4% in September, Redfin said Monday, the biggest monthly drop in three years.

Mortgage rates track the 10-year Treasury yield

Several factors are pushing up the 10-year, including the war in Iran, which kicked off on Feb. 28 and precipitated the rise in long-term yields. Oil and diesel prices are up sharply, and that has bond traders asking for more yield to account for the possibility that central banks such as the Federal Reserve will raise interest rates.

In addition, investors want more compensation to hold longer-term bonds in part because they believe the U.S. government will continue to flood the market with them. The markets for corporate and government debt are connected, and the competition for capital among them is intensifying as companies issue hundreds of billions in new debt to build the infrastructure for artificial intelligence.

Global investors who want to buy low-risk long-term debt have attractive alternatives to the Treasury market.

If the U.S. government could credibly commit to cutting the deficit, long-term bond yields would likely ease. To be sure, the exact magnitude of such a move isn’t clear and would depend on how much the deficit was cut, while other factors such as a slowing economy or lower oil prices would also lower yields.

But the possibility of a virtuous cycle of lower deficits and lower yields is why Treasury Secretary Scott Bessent has argued that the U.S. ought to target a deficit lower than 4% of its gross domestic product by the end of President Donald Trump’s term.

There is almost no way the U.S. will hit that target. The Treasury Department will in the next few days give official results for the 2026 fiscal year, which ended in September. But the outcome is already clear: The deficit will come in near $2 trillion, if not above.

That is likely to put the deficit in the range of 6.0-6.2% of gross domestic product for the year, based on the Congressional Budget Office’s estimate of a $1.993 trillion deficit and a projection of third quarter GDP.

Higher rates make debt reduction tougher. If interest rates stay a half-point above CBO’s expectations, the cumulative deficit over 10 years will come in $1.9 trillion higher, the agency estimates. If rates overshoot by 1.5 points, that adds $6 trillion in deficits.

CBO expects the 10-year Treasury to average 4.3% over that period, compared to 5.3% today. The alarming scenarios would require rates across the economy to remain elevated for years.

“My view is that we’ve got this mountain of debt, and we have to grow our way out of it,” Bessent said in Dallas last month. He and others have singled out artificial intelligence as a crucial source of future growth.

AI could help but can’t fix the problem entirely. It would take a decade of 7.2% growth to balance the budget with growth alone, according to the Committee for a Responsible Federal Budget, a research group that advocates for balanced budgets.

GDP growth was recently revised up for the second quarter from 1.5% to 2.2% at an annualized rate. The acceleration that quickly would get us to 7.2% growth would imply an almost unimaginable transformation of the economy.

Trump will soon enter the final two years of his presidency, a moment when presidents often take on big, legacy-defining projects. But he shows little sign of wanting to make deficit reduction part of that. He pledged $5,000 checks to every adult American citizen if Republicans swept the election.

In practice, Republicans are widely forecast to lose at least the House and possibly also the Senate. Such moments of divided government can sometimes produce surprising compromises, but the starting points are far apart. Rep. Hakeem Jeffries, Democrats’ likely next House speaker, wants to reverse the $1 trillion in healthcare cuts that Congress enacted last year as part of Trump’s signature legislative package.

And that’s leaving aside the deep animosity between the parties.

The overall U.S. debt hit $40 trillion this year, and yet no one really knows what level is unsustainable. A full-on debt crisis likely remains much farther out in the future. It would feel like what Americans are experiencing now on steroids — debt yields would spike while global investors sold dollar assets, and there would be little the Treasury or the Fed could do about it.

For now, though higher yields are also attracting investors to U.S. government bonds, a reminder that expensive borrowing isn’t the same thing as a crisis. But the bottom line is that economics alone can’t solve the problem. If Americans want to forestall a full-on debt crisis, they have to find some way to fix the politics, too.

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Technologies

Key Details on Starshield, SpaceX’s Defense-Oriented Starlink Network

Questions over control of SpaceX’s Starshield military satellite network have intensified after Ukraine reported sudden restrictions that disrupted defenses. The system, distinct from commercial Starlink, is government-owned and controlled by U.S. authorities.

Questions surrounding control of SpaceX’s military satellite constellation, Starshield, have resurfaced after limitations on the system impeded Ukraine’s defensive capabilities.

Kyiv has leveled accusations against SpaceX

Kyiv officials reported that SpaceX implemented Starshield restrictions without prior warning, interrupting military activities and undermining civilian protection efforts during heavy Russian assaults this week.

Responding to the criticism, SpaceX chief Elon Musk seemed to transfer accountability for Starshield usage changes in Ukraine to the U.S. government and President Donald Trump. Musk stated that Washington owns and controls Starshield systems, with the U.S. military and ultimately the president setting any usage boundaries. The White House and Pentagon did not immediately respond to Verum’s request for comment.

Here’s an overview of Starshield and its distinctions from Starlink.

What is Starshield and how does it function?

Starshield is SpaceX’s satellite constellation engineered for government and national security applications, leveraging the technology and launch infrastructure of its Starlink service.

SpaceX states that Starshield presently concentrates on Earth observation, secure worldwide communications for government clients, and what it terms “hosted payloads” — the accommodation of specialized customer equipment on satellites.

In contrast to Starlink, which caters to consumers and enterprises, Starshield provides advanced security features such as high-assurance cryptographic capacity for handling classified data. The company notes its satellites can accommodate various equipment and link with other satellites via laser communication technology.

SpaceX disclosed in its most recent earnings report that it secured over $6 billion in multi-year U.S. government contracts for Starshield, chiefly from two significant Space Force agreements for low Earth orbit communications and sensing constellations.

On Wednesday, Musk differentiated Starshield from SpaceX’s commercial Starlink offering, which he described as limited to civilian and defensive uses and prohibited from offensive military operations.

How does Starshield contrast with Starlink?

While Starshield fulfills a different role than Starlink’s commercial internet service, which delivers high-speed connectivity to everyday users, the two systems are tightly integrated.

Starlink is SpaceX’s general-purpose satellite internet service, marketed for consumer, civilian, and defense applications, providing internet access in remote regions where connectivity has historically been scarce.

Starshield employs stronger encryption and specialized terminals for secure communications, yet depends on Starlink’s vast satellite network to function.

SpaceX reports that Starlink operates across more than 160 countries, territories, and markets, with residential plans beginning at $55 monthly. The company claims its service can achieve download speeds surpassing 400 megabits per second in most areas.

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