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Detecting the Kick of a Single Gas Molecule

An experiment resolves the tiny momentum transferred from an individual gas molecule to a levitated nanoparticle.

For two centuries, collisions between atoms or molecules and small suspended objects have been understood only statistically. In 1827, Robert Brown first described the random motion of pollen in water. Eight decades later, Albert Einstein and Marian Smoluchowski independently explained the jitter as the accumulated effect of countless unseen molecular impacts—convincingly demonstrating the physical reality of atoms and molecules. However, individual kicks were never resolved. Only their collective consequence, Brownian motion, was ever visible. Modern trapped-ion experiments succeeded in watching individual atom–ion collisions perturb a single confined ion’s motion [1]. But there, the “projectile” and the “sensor” were both individual atomic-scale particles of comparable mass. Now David Moore at Yale University and his colleagues have extended single-collision detection to a very different regime [2].

Quantum magic state cleanup cuts errors 40-fold in first successful hardware test

Qubits, the quantum equivalent of digital bits, are fragile and prone to errors. That makes building reliable quantum computers extremely difficult. One fix has been to use traditional magic state distillation, which filters out flaws, but it is extremely resource-intensive.

Another potential solution is magic state cultivation, which cleans up a noisy magic state (a specially prepared quantum state that is needed for advanced calculations) directly inside a protected qubit. But this approach has never been tested successfully on real hardware.

However, in a first for quantum computing, Google Quantum AI researchers have demonstrated magic state cultivation on Willow, a superconducting processor, and it has cut errors dramatically.

Nanoscale tech tracks proteins inside living neurons to guide Alzheimer’s and Parkinson’s drug discovery

A technology developed at The University of Queensland allowing scientists to observe how disease-related proteins behave inside living neurons will be used to advance early drug discovery for neurodegenerative diseases. The NASTIC (Nanoscale Spatiotemporal Indexing Clustering) platform, spun out into Brisbane-based startup Accretion Bio, enables researchers to study real-time biological processes in living cells across space and time at the single-molecule level for the first time.

The platform is the result of more than two decades of research at UQ’s Queensland Brain Institute (QBI), led by professor Frederic Meunier.

New 4D biofabrication technology holds promise for tissue engineering, wound healing

If you’ve ever created a snowflake by folding, cutting and unfolding a piece of paper, you’ve practiced the art of kirigami. Like origami, kirigami has inspired innovations far beyond the elementary school classroom, with applications ranging from deployable structures for spacecraft to semiconductors.

Researchers at the University of Illinois Chicago’s College of Engineering have employed kirigami strategies to generate complex shapes that mimic tissue forms found in the human body. Their work has implications for tissue engineering and wound healing.

The paper, “A 4D Bio-Kirigami Strategy for Engineering Complex Tissue Curvatures,” was published in Cell Biomaterials. The authors included Kaelyn L. Gasvoda, Aixiang Ding, Zhangli Peng, Alexandria Sterenberg, Oju Jeon and Eben Alsberg.

Earth’s core may have been leaking hydrogen for billions of years

When Earth formed billions of years ago, its metallic core was wrapped in a global ocean of molten rock, which eventually cooled and crystallized to form the mantle. Today, when deep-rooted mantle plumes rise toward the surface and produce volcanic eruptions, the resulting lava can contain hydrogen from deep inside the planet.

Hydrogen comes in two stable forms, standard light hydrogen and a heavier version called deuterium. While most volcanic rocks have relatively normal hydrogen isotope ratios, some lavas associated with deep mantle plumes contain an unusually low proportion of deuterium.

That rare mix has provoked a major debate: Did this low-deuterium signature form long ago as the early magma ocean froze, or does it come from hydrogen leaking out of Earth’s metallic core?

13% of Earth’s land identified as biodiversity conservation hotspots

As governments prepare to gather in Yerevan, Armenia, this week for the U.N. Biodiversity Conference (COP17), new research identifies 13% of Earth’s land area as hotspots for biodiversity conservation, highlighting where conservation efforts are most urgently needed.

In their study published in the journal One Earth, an international team of researchers introduces a transparent and reproducible framework for mapping vertebrate conservation hotspots across Earth’s terrestrial surface. By analyzing data for 33,604 species of terrestrial vertebrates from the IUCN Red List, the authors combine information on where threatened and range-restricted species concentrate with key human-driven threats such as logging, agriculture, urbanization and invasive species.

Approximately 13% of the global land area is identified as a vertebrate hotspot, with many of these areas concentrated in tropical regions and broadleaf forests. Furthermore, these critical areas are home to over a third of the global human population, emphasizing the need for conservation approaches tailored to local conditions that protect biodiversity while also supporting people’s well-being.

Webb reveals metal-rich gas around Milky Way’s central black hole

The gas orbiting Sagittarius A (Sgr A•, the supermassive black hole at the center of the Milky Way galaxy, is rich in metals, researchers at McGill University’s Trottier Space Institute have found. The metal enrichment probably resulted from stars that exploded and released material into the black hole’s surroundings over time, they said.

The team also learned this gas is similar in composition to many of the stars in the black hole’s orbit, suggesting the gas and stars may have formed together.

Sgr A* is closer to Earth, and therefore easier to see, than any other supermassive black hole. These findings could advance understanding of how metals are distributed around supermassive black holes in more distant galaxies, as well as the processes that supplied Earth with many of these elements, the researchers suggested.

Forgotten particle could answer mystery of why we exist, say physicists

Scientists have unveiled a new theory on the birth of the cosmos, suggesting the early universe was shaped by an ancient particle that has been overlooked for decades.

Their research tackles one of the greatest conundrums in modern physics—how matter triumphed over antimatter in the aftermath of the Big Bang.

According to current theories, both should have annihilated each other after a colossal explosion, leaving nothing but an empty universe of pure energy. But physicists at the University of Southampton and the Indian Institute of Technology Kanpur say they found a clue in a neutrino, one of the lightest particles in the universe.

A little heat releases two fuels from a single crystalline compound

A team of researchers in India has developed a new compound capable of releasing both hydrogen and methane when heated at low temperatures. In their new study, published in Science Advances, the researchers show how this new compound can provide a foundation for creating recyclable molecular compounds for storing and delivering alternative fuel components.

Hydrogen is an attractive option as an alternative fuel source because it produces only water vapor and heat when used in a fuel cell or burned with oxygen. However, hydrogen fuel cells are expensive and technologies for the practical use of hydrogen fuel are still being studied and developed. Hydrogen–methane blends have been proposed as an option that may act as a transitional fuel between hydrocarbon-based fuels and hydrogen fuels.

Mixtures of hydrogen and methane have better combustion efficiency and lower emissions compared with hydrocarbon fuels. Hydrogen is highly combustible and flammable, but the addition of methane can lower the risks of flashback and detonation, making the fuel safer than pure hydrogen. However, there have been limitations associated with the storage and release of these mixtures.

Who is Elias the lighthouse keeper? AI fiction tells the same old story

Like a hack writer or a friend rehashing their glory days over and over, artificial intelligence tends to tell the same old story. For AI agents instructed to write fiction, that tale usually involves lighthouses and a keeper named Elias, according to new Cornell research.

Nearly 90% of AI-generated fictional stories written by current large language models (LLMs) like ChatGPT and Claude include at least one of 11 recurring words, including “lighthouse,” “keeper” and the names “Elias,” “Mara” and “Elara,” researchers found when directing LLMs to tell stories. More than half of AI-generated stories featured a lighthouse.

They also found part of the reason for these recurrences may be that many AI developers have trained LLMs on an important dataset created by Cornell researchers.