Science

Science

Alameda, California-based Science is aiming to improve on current perfusion systems that continuously circulate blood through vital organs when they can no longer function on their own. The technology is used to preserve organs for transplant and as a life-support measure for patients when the heart and lungs stop working, but it's clunky and costly. Science wants to make a smaller, more portable system that could provide long-term support.

Thousands of years ago in what is now the Dominican Republic, there was a cave full of bones. And those bones were full of bees. In a paleontological first, researchers have discovered that bees used the jawbones of now extinct mammals as burrows. It's not clear what species of bee was exploiting this grisly opportunityonly their smooth-walled nests were left behind, nestled in the tooth pockets of ancient rodents and sloths.

In the future, a caregiving machine might gently lift an elderly person out of bed in the morning and help them get dressed. A cleaning bot could trundle through a child's room, picking up scattered objects, depositing toys on shelves and tucking away dirty laundry. And in a factory, mechanical hands may assemble a next-generation smartphone from its first fragile component to the finishing touch.

Part of the motivation for conducting science is hope: the hope that what you're doing, research-wise, could end up revolutionizing how we conceptualize reality. Although we've come so far in understanding this Universe - including what its laws and constituents are at a fundamental level, and how those fundamental components assemble to create the varied and complex reality we inhabit today - we're certain that there's still more to learn, as many paradoxes about and several important puzzles remain unsolved.

The idea of having this medal, and Starmus being entrusted to organising it, is Jane's. Jane said she would like this to happen. And I think it's because of the very special relationship she had with us, he said. Goodall's grandson, Merlin van Lawick, welcomed the award. The Starmus Jane Goodall Earth medal will acknowledge sustainable programmes undertaken to make our world a better place for people, animals and the environment and provide encouragement for the continuation of that work, he said.

In what has become a common occurrence recently, the ground shook again in San Ramon on Tuesday, this time before sunrise. The magnitude 3.1 quake rattled the Tri-Valley at 5:53 a.m. and was centered about 3.1 miles southeast of San Ramon. There were no initial reports of damages or injuries. The quake came only eight days after three earthquakes shook the area in the course of about 100 minutes.

There are microbes living in medicine cabinets across the U.S., next to the aspirin and the Band-Aids. And people want them there. Indeed, consumers probably paid good money for them. Probiotics are capsules or pills with live microorganismsalmost always bacteria or yeastthat are supposed to confer health benefits once people swallow them. Some of my friends, including a woman who was recently treated for cancer and a man with persistent digestive issues, bought the pills at the recommendation of doctors.

Under no light but the stars, a green sea turtle hauls herself out of the surf and onto the familiar sand of Alagadi Beach on the northern coast of Cyprus. She doesn't notice any predators as she makes her way up the beach; tonight will be the night. When the turtle reaches a satisfactory spot, she nestles into the warm sand and begins excavating a deep pit. Nothing can distract her; she's gone into a kind of trance.

NASA, ESA, I. Pasha, P. van Dokkum Day 16 of the 2025 Space Telescope Advent Calendar: The Bullseye. This recent image of LEDA 1313424, nicknamed the Bullseye Galaxy, was made by the Hubble Space Telescope.

The brain's main task is to minimize the gap between expectation and reality. This gap is what the Free Energy Principle defines as free energy. When the brain encounters unpredictable input, its stress level rises. And it's crucial to understand: this isn't about you as a person or a "user", it's about your brain. It's not something we consciously control, but it's something we can use.

They focused on UPF1, a protein that acts like a proofreader, scanning RNA and destroying defective copies before they cause trouble. This process, called mRNA decay, is essential for healthy cells. The team discovered that UPF1 and TDP-43 normally work together to control the length of RNA messages - especially at their tail ends. These regions help regulate how long an RNA message lasts and where it goes in the cell. In ALS, these processes go haywire, leading to unstable RNA and stressed neurons.

In August 2025, I published my own attempt at characterizing affect, which I call the Affect Management Framework (AMF; Haynes-LaMotte, 2025). The conceptualization is grounded in the contemporary neuroscience perspectives of Predictive Processing(Clark, 2023) and Active Inference (Parr, Pezzulo, & Friston, 2022). It also draws inspiration from Ecological Psychology (Gibson, 1979; Withagen, 2022) and my own clinical experiences. Below I provide a high-level overview of the AMF, with the intention to explore each of these areas in more detail across other posts.

High up in the Arctic Circle, Olivier Chastel begins his working day by scanning the horizon for polar bears, rifle at the ready. "In 25 years I've never had to use it, but you can't be too careful," he explains. There can't be many conservationists who go birdwatching while armed, but the danger to life from bears in Svalbard - the largest island of the Norwegian polar archipelago - is so high that it's a legal requirement.

What I asked them to do was simple; I said, "Draw a scientist." I didn't give them any other directions. I didn't make up this experiment-researchers have been asking children of various ages to "Draw a scientist" for more than five decades. They don't do this because they are interested in children's art; instead, they are interested in how children think about scientists and, more specifically, whether they think of them as male or female.

Kendra Pierre-Louis: For Scientific American's Science Quickly, I'm Kendra Pierre-Louis, in for Rachel Feltman. You're listening to our weekly science news roundup. First up, the European Union's Copernicus Climate Change Service reported last Monday that 2025 is shaping up to be the second-hottest year on record, with data suggesting it will tie with 2023 for runner-up status. To learn more about what this means, we are talking to Andrea Thompson, senior desk editor for life science here at Scientific American. Hi, Andrea.

NASA, ESA, STScI

Even the closest exoplanets are more than 4 light years away (36 trillion miles), which makes it doubtful that we'll ever visit one-so why bother? The reason is, it helps us answer an age-old question: Are we alone in the universe? As far as we understand, you need a planet to have life, and the race is on to locate one with Earth-like qualities.

They can directly collapse to a black hole, they can become core-collapse supernovae, they can be torn apart by tidal cataclysms, they can be subsumed by other, larger stars, or they can die gently, as our Sun will, by blowing off their outer layers in a planetary nebula while their cores contract down to form a degenerate white dwarf. All of the forms of stellar death help enrich the Universe, adding new atoms, isotopes, and even molecules to the interstellar medium:

For decades, my colleagues and I advanced the premise that early substance use-nicotine, alcohol, or cannabis (or other addicting drugs)-interferes with critical maturation stages, particularly adolescence. Some questioned the science behind these premises, while others said it was propaganda from people disapproving of drugs like cannabis to justify their views. Despite this, clinicians often conveyed the cautionary: "The adolescent brain is still developing," or "Drugs hurt the teenage brain."

Neal Agarwal published another gift to the internet with Size of Life. It shows the scale of living things, starting with DNA, to hemoglobin, and keeps going up. The scientific illustrations are hand-drawn (without AI) by Julius Csotonyi. Sound & FX by Aleix Ramon and cello music by Iratxe Ibaibarriaga calm the mind and encourage a slow observation of things, but also grow in complexity and weight with the scale. It kind of feels like a meditation exercise.

Uranium is a weakly radioactive metal that is found in many parts of the world in low concentrations. It emits alpha, beta, and gamma particles that can be cancer-causing if exposure is intense and long-lasting enough. At weaker concentrations, it is used for nuclear medicine and other research purposes. The half-life of uranium is extremely long, ranging from 159,200 to 4.5 billion years, depending on the isotope. This makes it useful for dating the age of geologic strata and estimating the age of the Earth.

Negative self-talk was found to have a positive impact and lead to better performance on the second round of the test. This happened possibly because it created a state of heightened attention and internal motivation. People became more alert and focused after criticizing themselves. Positive self-talk was linked to changes in brain connectivity that improved executive functions such as planning, reasoning, and decision-making. However, it also gave rise to a degree of false confidence.

It also spins on its axiscompleting one Mars dayin 24 hours, 39 minutes and 35 seconds (to distinguish this period from an Earth day, we call it a sol, referencing the Latin word for the sun). Keeping track of your schedule on Mars would be different than doing so on Earth. But still, at its core, it would just be a matter of conversion.

NDEs occasionally include encounters with deceased individuals whose death was unknown to the experiencer. If NDEs were driven by expectation, accurate perceptions of unknown (and surprising) facts should not occur. Though rare, such experiences are reported with enough regularity to warrant systematic investigation. A new research protocol aims to document such cases with greater rigor than has previously been possible.

When animals cry, moths start licking their chops. The less glamorous relatives of butterflies have been known to use their long proboscis to sip the tears of everything from birds to reptiles to even domestic animals. But the behavior, known as lachryphagy, has been mostly observed in the tropics. Now, for the first time, researchers have documented moths drinking the tears of a moosejust the second time the behavior has been documented outside of the tropics. (The other was observed with a horse in Arkansas.)

This is basically adding a new dimension of information that plants and animals are using to communicate that we didn't know much about before.

With hundreds of lilts and cadences across our small island, the ever-changing sound of an Irish voice isn't a new phenomenon - and, of course, it's always the kids' fault