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New flexible drone can withstand collisions without sacrificing speed or agility

For more than a hundred years, quadcopters have been built according to the same basic principle. Four arms, each with a propeller, extend from a rigid central body. This design is ideal for precise, agile flight, but it has one major weakness—the drones are highly sensitive to unexpected contact with their surroundings. If they bump into a wall or another obstacle, they can become destabilized or even break apart.

Researchers at ETH Zurich hope to solve this problem with a new structural design. Their FlexiQuad drone features a soft, ring-shaped frame without a central body. The rotors, batteries and control module are evenly distributed along the frame. This design allows the drone to deform on impact, thereby absorbing some of the collision energy.

FlexiQuad was developed by Luca Girardi and Stefano Mintchev, then a professor at ETH Zurich, at the Environmental Robotics Lab. Girardi is currently conducting research at the Mobile Robotics Lab at ETH Zurich, while Mintchev has since taken up a professorship in agricultural robotics at the University of Bonn. The pair has filed a patent application for FlexiQuad, and the invention has been nominated for this year’s Spark Award.

Chiral altermagnon in MnTe

For centuries, we thought we understood magnets. But hidden inside a newly discovered class of magnetic materials is a twisting, invisible wave that could rewrite the rules of future technology.

The Discovery of the “Twisting” Magnetic Wave.

We are all familiar with everyday magnets, but physicists have recently identified a fascinating new class of magnetic materials called altermagnets. These materials act as a bridge, blending the familiar properties of standard magnets with the hidden, complex patterns of antiferromagnets.

Theoretical physicists predicted that inside altermagnets, magnetic energy travels in waves (known as “magnons”) that possess a specific “handedness.” Just as your left and right hands are mirror images but cannot be perfectly overlapped, these magnetic waves twist in distinct left-or right-handed directions—a property scientists call *chirality*.

Now, researchers have captured the first direct experimental proof of this phenomenon. Focusing on a well-known altermagnet candidate called manganese telluride (MnTe), scientists fired specially twisted X-ray light (circularly polarized light) at the material to stir up its magnetic waves. They observed that the material’s response changed depending on whether the light was twisted to the left or to the right. This proved that the magnetic waves themselves carry a distinct, directional twist. The team has officially named this newly verified phenomenon the “chiral altermagnon.”

This discovery is more than just a neat physics trick; it confirms a major theoretical prediction about how this new state of magnetism works at a fundamental level. By proving that these twisting magnetic waves exist and understanding how they behave, scientists have opened a new door for future technology.

Controlling these waves could eventually lead to breakthroughs in spintronics (ultra-fast, highly energy-efficient electronics that use magnetic “spin” instead of electrical charge to process information) and the development of advanced quantum computers.

Startup Northwood Space hits $2 billion valuation

Northwood Space raised $375 million in a Series C funding that valued the Torrance, California-based satellite antenna builder and ground station provider at $2 billion.

Why it matters: Modern and fortified infrastructure on Earth becomes more crucial for commercial, civil and military missions as the number of satellites in orbit swells.

Natural tooth protein could pave way for regenerative dental treatments

A protein that helps build teeth may one day be used to allow damaged teeth to repair themselves.

That possibility is the focus of research led by Anne George, professor in the Department of Oral Biology at the UIC College of Dentistry. George has received a $1.2 million grant from the National Institute of Dental and Craniofacial Research at the National Institutes of Health to advance her studies of dentin phosphophoryn.

Dentin phosphophoryn is mainly found in dentin, which is the mineralized tissue that makes up the bulk of each tooth under its enamel surface. The most acidic protein known in nature, and it helps in the calcification of the protein matrix to form dentin.

Scientists shrink Archimedes’ screw to the size of a single molecule

Scientists have developed a remarkable new molecular motor that spins when electricity passes through it. Inspired by an ancient invention, the tiny machine can even reverse its direction when the electrical voltage is switched. The achievement marks an important step toward creating working machines at the smallest possible scale.

Molecular machines are widely seen as a promising next frontier in miniaturization. Nature already provides examples inside living cells, where molecular motors use energy to produce movement. Researchers have spent decades trying to recreate these remarkable biological systems artificially, and progress in this field was recognized with the 2016 Nobel Prize in Chemistry.

Debora Spar on Work Mate Marry Love: How Machines Shape Our Human Destiny

The plow made men powerful. The pill handed some of that power back to women.

Harvard Business School’s Debora Spar walked me through that idea back in 2020, two years before ChatGPT made everyone suddenly care about how machines reshape our lives.

Her point was bigger than #AI or any single gadget. Technology doesn’t just change how we work. It changes who we marry, how we love, and what we believe men and women are for. Most of us still look at tech through an engineering lens. She insists on the widest lens possible.

Then she told me her book reads history through a Marxist lens. A former Barnard president and HBS dean, saying that on the record.

We also got into why tech self-regulation has never worked, what Keynes predicted for his grandchildren (and us), #FutureOfWork and technological unemployment, and what Tinder is doing to sex and relationships.

Six years later, one question won’t leave me alone: if the plow and the pill rewired the family, what will thinking machines do to it?

A magnetar can be born when two neutron stars touch

All neutron stars have intense magnetic fields. The typical magnetic field of a neutron star is about 100,000 times stronger than the strongest magnetic fields we can create on Earth. But about 1% of neutron stars have even stronger magnetic fields. Known as magnetars, their magnetic fields can be 1,000 times stronger than a regular magnetic field. They are a likely cause of powerful transient events such as soft gamma-ray repeaters and fast radio bursts. A new study looks at how magnetars might form. The findings are published on the arXiv preprint server.

The work focuses on the mergers of binary neutron stars. Often when two neutron stars collide, they form a black hole. This is because the combined mass of the two neutron stars is greater than the Tolman-Oppenheimer-Volkoff (TOV) limit, which is around 2.6 solar masses. Most neutron stars are more massive than white dwarfs, which have a Chandrasekhar limit of about 1.4 solar masses. But some neutron stars have smaller masses. If they happen to have a total mass less than the TOV limit, then they can merge and become a single neutron star.

Using high-resolution simulations run on the Japanese supercomputer FUGAKU, the team looked at the merger of low-mass neutron star binaries. To simplify things a bit, they assumed stars with identical masses, but otherwise typical neutron stars. They assumed the magnetic field strengths of these stars were around 3 trillion gauss, which is in the upper range of typical neutron stars. Their simulations ran from just moments before the stars collide until just after.

Background static can carry wireless data without an actively generated radio signal

Stanford researchers recently revealed how a seemingly physics-defying wireless communication technology works. The new technology, called thermal noise communication, harnesses background static that normally is the bane of radio, cellular and other wireless signals. In their new study published in the Proceedings of the National Academy of Sciences, the team showed how a transmitter could deliver data to a receiver without any actively produced signal by manipulating tiny oscillations in voltage.

The findings describe how the system works at a fundamental level, opening the door to improving the communication mode and determining real-world applications for it. “We’ve built a system that others could very easily implement,” said senior author Zerina Kapetanovic, an assistant professor of electrical engineering.

A physics mystery In her previous research at the University of Washington, Kapetanovic studied agricultural sensing technologies, which inspired her to pursue low-power modes of relaying data like soil moisture levels. She wondered if it might be possible to create a device similar to the radio-frequency identification (RFID) window tags that are used for highway tolls in cars—without requiring an energy-intensive radio signal to ping.

How Do You Defend a Space Colony? | Beyond Space Defense

In space, every ship, tug, mass driver, and power beam can become a weapon. We explore how future stations and settlements might defend themselves against attack, sabotage, accidents, and siege.

Explore A Dream Renewed: Space Settlement in the 21st Century: https://sfia.s.gy/a-dream-renewed.

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall… Visit our Website: http://www.isaacarthur.net ❤️ Support us on Patreon: / isaacarthur ⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-a… 👥 Facebook Group: / 1,583,992,725,237,264 📣 Reddit Community: / isaacarthur 🐦 Follow on Twitter / X: / isaac_a_arthur 💬 SFIA Discord Server: / discord Credits: Beyond Space Defense: War, Sabotage & Survival Beyond Earth Written, Produced & Narrated by: Isaac Arthur Music by Epidemic Sound: http://nebula.tv/epidemic Select imagery/video supplied by Getty Images Table of Contents 0:00 Intro 2:45 The War We Already Have in Space 5:38 Fight Far From Home 8:30 The Perimeter 10:50 Everything Is a Potential Weapon 13:45 A Dream Renewed 14:59 Siege Without Shooting 17:38 The City Is Part of Your Spacesuit 22:07 The Hardest Target to Kill.
🌐 Visit our Website: http://www.isaacarthur.net.
❤️ Support us on Patreon: / isaacarthur.
⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-a…
👥 Facebook Group: / 1583992725237264
📣 Reddit Community: / isaacarthur.
🐦 Follow on Twitter / X: / isaac_a_arthur.
💬 SFIA Discord Server: / discord.
Credits:
Beyond Space Defense: War, Sabotage \& Survival Beyond Earth.
Written, Produced \& Narrated by: Isaac Arthur.
Music by Epidemic Sound: http://nebula.tv/epidemic.
Select imagery/video supplied by Getty Images.

Table of Contents.
0:00 Intro.
2:45 The War We Already Have in Space.
5:38 Fight Far From Home.
8:30 The Perimeter.
10:50 Everything Is a Potential Weapon.
13:45 A Dream Renewed.
14:59 Siege Without Shooting.
17:38 The City Is Part of Your Spacesuit.
22:07 The Hardest Target to Kill.