Technologies

These Tiny Robots Are Smaller Than Grains of Salt and Can Think, Move and Swim

Despite their size, the robots can navigate liquids, respond to their environment and operate without external control.

Robots smaller than a grain of salt? It sounds like science fiction, but researchers have developed autonomous microrobots that can move through liquids, sense their environment and operate independently using only light as a power source.

The microrobots, developed by researchers at the University of Pennsylvania and the University of Michigan, measure roughly 200 by 300 by 50 micrometers. Yet they can detect temperature changes, follow programmed paths and function independently for months at a time.

Their work was reported this week in two scientific journals, Science Robotics and Proceedings of the National Academy of Sciences.

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«We’ve made autonomous robots 10,000 times smaller,» senior author Marc Miskin, assistant professor in electrical and systems engineering at Penn Engineering, said in a statement. «That opens up an entirely new scale for programmable robots.»

Powered entirely by light, the robots don’t move using mechanical limbs. Instead, they generate tiny electrical fields that push ions (electrically charged particles) in fluid to create motion, an approach better suited to the unique physics of the microscopic world, where traditional motors don’t work.

Unlike earlier microrobots, these devices combine sensing, computing, decision-making and movement in a single, self-contained system at an extremely small scale.

Previous efforts in microrobotics have often relied on external controls, such as magnetic fields or physical tethers, to guide movement. These new microrobots, however, incorporate their own miniature solar cell-powered processors, allowing them to respond to their environment, communicate through patterned movements visible under a microscope and carry out tasks without outside direction.

Potential applications include monitoring biological processes at the cellular level, supporting medical diagnostics or helping assemble tiny devices. Because each robot can be mass-produced at very low cost, the technology opens new avenues for research and engineering at scales that were previously unreachable.

Technologies

Speediance Unveils New Compact Resistance Trainer and Wearable

Speediance is aiming to make strength training more portable with a wearable unveiled at CES.

Speediance unveiled its new Gym Nano and Speediance Strap products this week at CES 2026. The smart fitness equipment manufacturer, which previously developed its own smart home gym, the Gym Monster 2, designed the Gym Nano and Speediance Strap to complement its current equipment ecosystem.

«Rather than developing products in isolation, we’re building a comprehensive training and health ecosystem that adapts to users’ real lives and empowers better decision-making over time,» Speediance founder and CEO Liu Tao said in a statement.

Speediance used the consumer tech expo in Las Vegas to demonstrate the Gym Nano, a portable, motor-driven cable resistance training system designed to occupy minimal space for those who prefer to work out at home. The strap is a prototype wearable device designed to read your health data and provide training recommendations based on this insight.

CNET previously tested Speediance’s VeloNix AI Smart Bike and named it the best AI-powered exercise bike.

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Gym Nano

The Gym Nano is a compact digital cable resistance machine trainer that fits any space and delivers full-body workouts. It’s meant to make strength training at home easier if you have limited space and can’t commit to larger home gym equipment.

The Gym Nano offers up to 220 pounds of resistance through adjustable 1-pound increments. It also has five dynamic weight modes: Eccentric, Chain, Standard, Fixed Speed and Sled.

Speediance Strap

The strap can be used for both endurance and strength training activities and recognizes various types of exercises, movement patterns, training volume and other insights that can help you learn how well your body is responding to your training.

The Speediance Strap is a screen-free wearable that collects data related to your sleep, training and core body temperature. It then uploads and shares this data to the Speediance Wellness Plus app, where it makes suggestions for your daily training and recovery based on this information. Similar to other wearables, the Speediance Strap assesses your readiness each day and can detect stress factors to determine if you should focus more on recovery on that day.

«With Speediance Strap, we are exploring how wearable data can function as part of a decision-support layer within a connected fitness system, rather than existing as isolated metrics,» Tao said in a statement.

Additionally, everyday insights (like core and recovery data) will be free to you unless you want to upgrade to the Wellness Plus access, which will come at an additional cost to receive long-term insights and AI planning.

It’s unclear when the Gym Nano will be available for purchase, but the Speediance Strap is expected to launch through a Kickstarter campaign in spring 2026.

Technologies

Today’s Wordle Hints, Answer and Help for Jan. 8, #1664

Here are hints and the answer for today’s Wordle for Jan. 8, No. 1,664.

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

Today’s Wordle puzzle has only one vowel, so if you always guess ADIEU or AUDIO first, maybe rethink that decision. If you need a new starter word, check out our list of which letters show up the most in English words. If you need hints and the answer, read on.

Today’s Wordle hints

Before we show you today’s Wordle answer, we’ll give you some hints. If you don’t want a spoiler, look away now.

Wordle hint No. 1: Repeats

Today’s Wordle answer has no repeated letters.

Wordle hint No. 2: Vowels

Today’s Wordle answer has one vowel.

Wordle hint No. 3: First letter

Today’s Wordle answer begins with B.

Wordle hint No. 4: Last letter

Today’s Wordle answer ends with T.

Wordle hint No. 5: Meaning

Today’s Wordle answer can refer to blowing something up with an explosion.

TODAY’S WORDLE ANSWER

Today’s Wordle answer is BLAST.

Yesterday’s Wordle answer

Yesterday’s Wordle answer, Jan. 7, No. 1663 was PECAN.

Recent Wordle answers

Jan. 3, No. 1659: SITAR

Jan. 4, No. 1660: POSSE

Jan. 5, No. 1661: FILLY

Jan. 6, No. 1662: OOMPH

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Technologies

Sony Reveals Hyperpop Collection for PS5

The new collection features brightly colored consoles and controller covers and will be available for preorder later this month.

Sony has unveiled its newly designed DualSense wireless controllers and PlayStation 5 console covers for its PS5 consoles. The new colors in the Hyperpop Collection are red, green and blue, and they feature a gradient effect that shifts from black to bright neon.

«A seamless gradient wraps around the front and back of the DualSense, finished in a high-gloss coat that makes the colors pop more than ever,» Sae Kobayashi, a member of Sony’s Color, Material and Finish design team, said in a release about the launch on Wednesday. «The console covers are also getting the same glow-up, featuring a subtle hint of transparency.»

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The colors have been officially named Techno Red, Remix Green and Rhythm Blue. According to Leo Cardoso, another member of the Color, Material, and Finish design team, the colors were «inspired by the glow of the RGB lights of your impressive gaming setups.»

Preorders begin on Jan. 16, with the collection officially launching on March 12.