Welcome to Peer Review'd, the show where we break down the latest science news and make it actually make sense. I'm your host, and today we have an absolutely packed episode — from dying stars that look like brains, to cancer breakthroughs, mysterious asteroid hearts, and even fanged frogs living a double life. Let's dive in.

We're starting in deep space, because honestly, where else would you start? NASA's James Webb Space Telescope has captured something truly haunting — a nebula that looks exactly like a human brain floating in space. Nicknamed the 'Exposed Cranium' nebula, it was formed by a dying star shedding its outer layers. Webb's infrared vision reveals layered gas, a dark central divide, and what may be powerful jets sculpting that eerie shape. It's a brief but dramatic phase in a star's final moments, and Webb is giving us a front-row seat.

And speaking of dramatic cosmic moments — astronomers have confirmed the first-ever direct observation of a magnetar being born. A magnetar, for those unfamiliar, is essentially the most extreme magnet in the universe — a super-dense, rapidly spinning neutron star with an insanely powerful magnetic field. For sixteen years, scientists theorized that magnetars power some of the brightest stellar explosions ever recorded, called superluminous supernovae. Now, for the first time, they've found the signal that proves it. Sixteen years of theory, finally confirmed.

But wait, there's more cosmic chaos. Scientists spotted a black hole and a neutron star colliding — and the orbit was all wrong. Instead of the nearly circular path that physics models predicted, this pair was moving in an oval-shaped, or eccentric, orbit. The discovery came from gravitational wave data, and it's forcing researchers to rethink how these extreme objects pair up in the first place.

And then there's this gem: astronomers watching archived telescope data from 2020 caught what appears to be two planets colliding around a distant star about eleven thousand light-years away. The star, called Gaia20ehk, showed strange brightness changes that match what you'd expect from a catastrophic planetary smashup. Planetary collisions are thought to be common in young solar systems, but actually catching one in progress? That's extraordinarily rare.

Now, let's shift to a mystery much closer to home — well, in our solar system, at least. The asteroid Psyche has puzzled scientists for over two centuries. Is it the exposed metallic core of a planet that never fully formed? Or just a chaotic mix of rock and metal from billions of years of violent collisions? Researchers simulated the formation of a massive crater near Psyche's north pole and found that the asteroid's internal porosity — basically, how much empty space it contains — could be the key to finally answering that question. NASA's Psyche spacecraft is already on its way there, so we may not have to wait long.

Also out in the cosmos — a supernova from over ten billion years ago may be giving us new clues about dark energy. Astronomers found an extraordinarily bright ancient explosion whose light was bent and magnified by a galaxy sitting in the foreground. This gravitational lensing created multiple images of the same supernova, with light arriving at Earth at different times — essentially letting scientists watch the same explosion from different moments simultaneously. The implications for understanding dark energy, the mysterious force accelerating the universe's expansion, could be significant.

And there's another cosmic mystery in play: scientists studying cosmic birefringence — a subtle twist in the polarization of the universe's oldest light, the cosmic microwave background — have developed a more precise way to measure it. This faint rotation could point to entirely new physics, including hidden particles like axions, and may offer clues about dark matter and dark energy. The universe, it seems, is still hiding a lot from us.

Okay, let's come back to Earth, and to some genuinely exciting medical science. Researchers have achieved something remarkable in cancer treatment. They engineered a more powerful immune-activating antibody and, crucially, changed the delivery method — injecting it directly into tumors rather than into the bloodstream. In a small clinical trial of twelve patients with metastatic cancers, six saw their tumors shrink, and two experienced complete remission. Not just at the injection site — tumors elsewhere in the body responded too. The immune system, once activated locally, went systemic. This approach has been attempted before with disappointing results, but this redesigned version is turning heads.

On the neuroscience front, there's a fascinating new finding about depression. When mice experience brain injury, researchers kept noticing a specific group of cells — oligodendrocytes, the brain's so-called 'insulation cells' — rapidly appearing near the damage and becoming active. Scientists now think these cells may play a protective role in mental health, and that disrupting this mechanism could contribute to depression. It's a completely new angle on a condition that affects hundreds of millions of people worldwide.

Also in brain science: researchers studying ADHD found that people with the condition experience brief bursts of sleep-like brain activity while they're awake and performing demanding tasks. These micro-intrusions of sleep-state brain patterns may help explain why staying focused is genuinely difficult for people with ADHD — it's not a lack of effort, it's the brain momentarily slipping into a different mode.

And here's something intriguing for anyone who's heard about psilocybin therapy: scientists may have developed a compound that delivers the brain benefits of magic mushrooms without the hallucinogenic trip. Psilocybin has shown real promise for treating depression, anxiety, and substance use disorders — but the psychedelic experience itself can be a barrier. A new compound appears to promote brain plasticity and therapeutic effects while skipping the hallucinations. Clinical trials are still ahead, but it's a potentially significant step.

In gut health news, researchers at Case Western Reserve University have found evidence that gut bacteria may contribute to brain damage in ALS and frontotemporal dementia. The gut-brain axis keeps revealing itself as far more influential than we ever imagined, and this finding could open new treatment pathways for two of the most devastating neurological conditions out there.

For cancer survivors, a new study brings a sobering message: eating more ultraprocessed foods was associated with significantly higher risks of dying from both any cause and from cancer specifically. The research, published in a major oncology journal, is another data point in a growing body of evidence that what we eat matters profoundly — especially after a cancer diagnosis.

Now, here's one that sounds almost science fiction: a common pesticide called chlorpyrifos may more than double the risk of developing Parkinson's disease. A UCLA Health study found that people living in areas with long-term exposure had over two and a half times the likelihood of developing the disorder. Lab animals exposed to the chemical lost dopamine-producing neurons and developed the same toxic protein buildup seen in Parkinson's patients. Chlorpyrifos has already been restricted in many places, but this research adds serious urgency to those conversations.

Switching gears to something unexpectedly delightful — scientists built a life-size replica of an oviraptor dinosaur and its nest to study how these bird-like creatures hatched their eggs. The question was whether they brooded like modern birds or relied on environmental heat like crocodiles. The answer? It looks like oviraptors actually used a combination of both — and the findings are reshaping how we understand dinosaur parenting behavior.

And in a story that proves taxonomy is never really finished: a species of fanged frog known since 1838 turns out to be not one species, but several. A genetic study of Southeast Asia's fanged frogs found enough distinct differences among populations to split what we thought was a single species into multiple unique ones. It's a reminder that even well-studied animals can hide secrets.

Finally, two more stories worth flagging. Researchers studying the very first cell divisions after fertilization have found that telomeres — the protective caps on chromosome ends — actively adjust their length during those earliest moments of life. This early calibration may influence longevity and cancer risk decades later. The implications for understanding aging and disease are profound.

And on the physics side: scientists at CERN's Large Hadron Collider have identified a new proton-like particle called the Xi-cc-plus — a heavy, double-charmed baryon that had long been theoretically predicted but never confirmed. Researchers from the University of Manchester played a key role in pinning it down. Every new particle we find adds another piece to our understanding of the fundamental building blocks of matter.

That is a lot of science for one day, and honestly, that's what we love about this field. From the tiniest subatomic particles to billion-year-old supernovae, from the bacteria in your gut to the craters on a metal asteroid — it's all connected by the same relentless human curiosity.

That's it for today's episode of Peer Review'd. If you enjoyed this episode, share it with someone who loves science, leave us a review, and come back next time for more of the discoveries shaping our understanding of the universe. Until then, stay curious.