Technologies

Space Cities Inside Asteroids Could Actually Work, Scientists Say

The plan «on the edge of science and science fiction» involves an asteroid, an expandable mesh bag and a whole lot of audacity.

Good news, Earthlings. We have more to look forward to than just the drab landscape of the moon or the inhospitable surface of Mars when it comes to far-flung future human civilizations off this rock. We might one day be living la vida asteroid.

Yes, space-faring piles of rocky rubble (like famous asteroid Bennu) could be home sweet home. A group of scientists at the University of Rochester in New York worked out a plan for turning asteroids into spinning space cities with artificial gravity. The researchers published a «wildly theoretical» study in Frontiers in Astronomy and Space Sciences earlier this year.

«Our paper lives on the edge of science and science fiction,» said co-author Adam Frank in a University of Rochester statement last week. Frank is a professor of physics and astronomy at the school.

The basic concept behind the asteroid city builds on an idea called the O’Neill cylinder, a rotating space colony design proposed by physicist Gerard O’Neill in the 1970s. The rotation creates artificial gravity. Think of something along the lines of the cylindrical Cooper Station in the movie Interstellar. It’s a fascinating idea, but it would be difficult and expensive to transport enough material into space to make a large-scale O’Neill cylinder.

This is where things get wilder. The Rochester research team proposes a way to turn a rock pile of an asteroid into a cylinder by surrounding it with a thin, high-strength mesh bag made from carbon nanofibers. It would have an accordion-like design.

«A cylindrical containment bag constructed from carbon nanotubes would be extremely light relative to the mass of the asteroid rubble and the habitat, yet strong enough to hold everything together,» said study co-author Peter Miklavcic, a doctoral candidate in mechanical engineering.

Spinning an asteroid would cause its rubble to break apart, expanding the bag and creating a layer of rock against it. That layer would provide radiation shielding for a colony inside the cylinder while the continued spin would create artificial gravity.

It sounds far-fetched, but Frank said the technologies and engineering behind the asteroid city technically obey the laws of physics. «Based on our calculations, a 300-meter-diameter asteroid just a few football fields across could be expanded into a cylindrical space habitat with about 22 square miles of living area,» Frank said. «That’s roughly the size of Manhattan.»

Of course, bagging and spinning an asteroid wouldn’t be simple. The researchers suggest using solar-powered rubble cannons to get the spin going. There’s also the matter of constructing a human-safe colony on the interior, but we can leave those challenges for the future.

Sci-fi writers have long envisioned life on asteroids. The paper provides a new way of thinking through that possibility in a way that could protect human occupants and make them feel more at home. It’s a good companion piece to another recent space thought experiment that offered up a plan for building a «forest bubble» on Mars.

My imagination is now taking me from my cozy quarters inside an asteroid to a vacation destination in a Martian nature reserve. This may not be relegated to the realm of sci-fi forever. «Space cities might seem like a fantasy now,» Frank said, «but history shows that a century or so of technological progress can make impossible things possible.»

Technologies

Finally, I’ve Found a Worthy Successor to the Iconic ’90s Tamagotchi

This virtual pet grows physically bigger the more you play with it.

Back in 1996, when Tamagotchis became the must-have toy, I was 8 years old — the perfect target audience. I remember handing over my crisp British £10 note to the good people at Toys R Us, shaking with anticipation. It was the most money I’d ever spent in one go, but I knew it would be worth it to own one of the magenta virtual pets just like all of my classmates.

Thirty years later at CES 2026 in Las Vegas, I finally found a worthy successor to my treasured pixelated companion. Sweekar is a Tamagotchi-inspired pocket pet, an AI companion that grows physically bigger as it matures.

Sweekar begins life as an egg with ears. In a demo, it lays in my hand, and I tap it gently three times on the head, making its yellow ears glow. The egg opens to reveal a screen displaying a cracking shell. A pair of sleepy eyes pops into view.

On the Las Vegas show floor, Sweekar was ready to go for my demo, but usually, the incubation stage can take up to two days. The egg perches on its base until the shell cracks open, from which point little Sweekar will spend between five and seven days in baby stage. Next up is the teen stage (21 to 45 days), followed by Sweekar adulthood.

With each life stage, Sweekar grows a little bigger. Just like the original Tamagotchi, each stage brings a series of new challenges for you as its owner. The early days mean high-frequency care with basic language learning. The teen years bring greater intelligence and a more distinct personality. Eventually, you can progress to owning a pet that’s autonomous, requiring less care, but which has more fun gameplay options. And… Sweekar can also die if you neglect it.

In all of these senses, it feels remarkably true to the spirit of the original Tamagotchi, but with AI technology that could ultimately provide a more rewarding experience in the long term. Hopefully, it will inspire owners to keep it alive longer than the many little Tamagotchi chicks that perished due to lack of care.

If you want to get your hands on a Sweekar to bring some ’90s-inspired magic to a kid’s childhood (or if you’re just feeling nostalgic — I won’t judge), it will be available via Kickstarter later this year. You’ll need more than a £10 note to secure one, however. Sweekar will be priced at a far more substantial $150.

Technologies

Today’s NYT Mini Crossword Answers for Monday, Jan. 5

Here are the answers for The New York Times Mini Crossword for Jan. 5.

Looking for the most recent Mini Crossword answer? Click here for today’s Mini Crossword hints, as well as our daily answers and hints for The New York Times Wordle, Strands, Connections and Connections: Sports Edition puzzles.

Fans of the Knives Out film series, today’s Mini Crossword has a clue just for you. Read on for all the answers. And if you could use some hints and guidance for daily solving, check out our Mini Crossword tips.

If you’re looking for today’s Wordle, Connections, Connections: Sports Edition and Strands answers, you can visit CNET’s NYT puzzle hints page.

Read more: Tips and Tricks for Solving The New York Times Mini Crossword

Let’s get to those Mini Crossword clues and answers.

Mini across clues and answers

1A clue: «Now I get it!»
Answer: AHA

4A clue: Benoit ___, detective in the «Knives Out» films
Answer: BLANC

6A clue: Give one’s two cents
Answer: OPINE

7A clue: Time difference between the East and West Coast, in hours
Answer: THREE

8A clue: Pirate’s assent
Answer: AYE

Mini down clues and answers

1D clue: Generation after Gen Z
Answer: ALPHA

2D clue: In need of a shave
Answer: HAIRY

3D clue: «Bonne ___!» («Happy New Year!,» in French)
Answer: ANNEE

4D clue: Many a social media antagonist, sadly
Answer: BOT

5D clue: First in «class»?
Answer: CEE

Don’t miss any of our unbiased tech content and lab-based reviews. Add CNET as a preferred Google source.

Technologies

Today’s NYT Connections: Sports Edition Hints and Answers for Jan. 5, #469

Here are hints and the answers for the NYT Connections: Sports Edition puzzle No. 469 for Monday, Jan. 5.

Looking for the most recent regular Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles.

Today’s Connections: Sports Edition features a diverse mix of categories, so it might be tricky. If you’re struggling with today’s puzzle but still want to solve it, read on for hints and the answers.

Connections: Sports Edition is published by The Athletic, the subscription-based sports journalism site owned by The Times. It doesn’t appear in the NYT Games app, but it does in The Athletic’s own app. Or you can play it for free online.

Read more: NYT Connections: Sports Edition Puzzle Comes Out of Beta

Hints for today’s Connections: Sports Edition groups

Here are four hints for the groupings in today’s Connections: Sports Edition puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.

Yellow group hint: Fore!

Green group hint: Hoops info.

Blue group hint: Big Apple legends.

Purple group hint: Toddlers play with this toy.