Paleontologists in Australia have identified an entirely new order of marsupials that survived for 35 million years, hiding unrecognized in the fossil record. Scientists have also pinpointed the rare asteroid type that ended the dinosaurs — and overturned what we thought was its killing mechanism. On the health front, a newly discovered protein may hold the key to slowing how Alzheimer's spreads through the brain, while a clinical trial finds a cheap antidepressant could meaningfully help long COVID fatigue sufferers. Plus, explorers have finally captured the first close-up images of Shackleton's last ship, resting on the ocean floor more than a century after it sank.

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Scientists may have finally solved a 50-year-old black hole mystery with a new thermodynamic framework that could change everything we thought we knew about these cosmic giants. China's Mars orbiter captured rare images of interstellar comet 3I/ATLAS — only the third object ever confirmed to have traveled from another star system into ours. A surprising prostate cancer study found that more than half of patients who initially tested negative for recurrence were later found to have cancer on a second scan, raising urgent questions about when and how often we look. Rising CO2 levels in our atmosphere may already be subtly shifting human blood chemistry, offering a stark reminder that climate change could have direct consequences for our bodies. Plus, a tiny mouse discovered surviving at over 22,000 feet in the Andes, a blue-light drug discovery breakthrough, and why AI vision models may be getting the right answers for entirely the wrong reasons.

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A newly published fossil study is upending the conventional story of human evolution, suggesting our defining traits emerged through a far more fragmented and unexpected process than previously thought. Astronomers are puzzled by a black hole that suddenly switched on like a cosmic radio beacon over eight years ago — intensifying its emissions by more than twentyfold and showing no signs of fading. Researchers have made a striking breakthrough in glioblastoma treatment, using sugar-coated nanoparticles to smuggle genetic instructions past the blood-brain barrier, increasing median survival by 50% in mouse studies. A drug originally designed for spinal cord injuries has shown multi-pathway promise against Alzheimer's disease and has already cleared an initial human safety trial, potentially accelerating its path to clinical testing. Theoretical physicists are now proposing that dark matter may be concealed within a fifth spatial dimension — a bold idea that could reframe decades of fruitless searching for the universe's most elusive substance.

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NASA's James Webb Space Telescope has delivered a jaw-dropping look at 55 Cancri e, a hellish lava planet with a volcanic atmosphere unlike anything previously observed. Meanwhile, new genetic research is upending everything we thought we knew about human evolution, suggesting Homo erectus may have left a detectable genetic legacy in people alive today. On the health front, a surprising drug already approved for constipation is showing early promise in clearing cognitive symptoms linked to depression, and a natural compound found in aged cheese may help older immune systems respond to vaccines like younger ones. We also cover a rare Ebola-family virus outbreak in the Democratic Republic of the Congo, rising breast cancer rates among Asian American women, and the astonishing discovery of Homer's Iliad hidden inside a 1,600-year-old Egyptian mummy.

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NASA has selected 41 proposals from 37 companies to develop critical technologies for long-term human presence on the Moon and Mars, while also tapping three commercial partners for new lunar missions launching in 2028. Meanwhile, Perseverance just hit a jaw-dropping milestone on the Martian surface after five years of exploration. Back on Earth, 567-million-year-old fossils are pushing back the timeline of complex animal life, and scientists uncovered a 5-million-year-old whale graveyard beneath the Indian Ocean packed with evolutionary clues. We also dig into what chimpanzees reveal about humanity's ancient obsession with crystals, a potential breakthrough in pancreatic cancer treatment, and why your childhood soda habit might be affecting your heart right now.

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Scientists have just identified a new fundamental limit in quantum mechanics that goes beyond Heisenberg's uncertainty principle, reshaping our understanding of the subatomic world. Meanwhile, NASA's Perseverance rover has smashed a Mars driving record, and four new commercial Moon missions just received nearly $600 million in funding as humanity edges closer to a permanent lunar base. A landmark study is dismantling a 70-year-old model of how the brain works, with major implications for mental health and decision-making. We also cover poison-resistant rats evolving in real time in U.S. cities, a hidden communication network discovered inside the human eye, and a fossilized T. rex tooth found embedded in another dinosaur's face — all in today's episode of Peer Review'd.

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Scientists have overturned a 60-year-old understanding of collagen's structure, potentially unlocking new treatments for fibrosis and cancer, while researchers have also cracked the mystery behind why statins cause muscle pain in millions of patients. In astrophysics, two independent experiments have dealt a major blow to a decades-old dark matter detection claim, and astronomers have found a new way to track supermassive black holes that have been violently ejected from their home galaxies. A 450-million-year-old fossil with preserved soft tissue has given scientists an unprecedented look at ancient reef life, and new DNA research suggests your disgust at eating insects may be written into your genes. From a promising new antibody targeting aggressive prostate cancer to chimpanzees potentially performing ritual behavior, this week's discoveries span the full frontier of science.

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Scientists have uncovered a surprising functional role for the pigment that gives red hair its color, revealing it may quietly protect cells in ways no one expected. A major new study links uninterrupted sitting to a significantly higher cancer mortality risk, while fresh research from Cedars-Sinai adds to the growing case that coffee is quietly protecting your liver. Astronomers have spotted 31 previously unknown ancient quasars, offering the clearest look yet at supermassive black holes that somehow grew enormous just after the Big Bang. Meanwhile, a landmark genetic discovery caught a 'jumping gene' traveling between species through dead cells—something scientists didn't think was possible—and researchers have finally explained, at the atomic level, why gold never tarnishes.

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Scientists have uncovered a startling chapter in Neanderthal history — a near-extinction event 75,000 years ago that left a tiny group of survivors to repopulate Europe. Meanwhile, quantum physicists are challenging a foundational assumption about the math underlying reality itself, and dark matter may be secretly interacting with neutrinos in ways that rewrite our model of the universe. In medical news, a sugar-coated nanoparticle technique is showing real promise in delivering treatment past the brain's toughest barrier to fight glioblastoma — one of the deadliest cancers known. And new Alzheimer's research suggests the earliest warning sign may have nothing to do with memory at all.

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Archaeologists may have been misreading ancient Mediterranean trade routes for decades after new research reveals that soil chemistry could be contaminating olive oil residue analysis in ancient pottery. Meanwhile, scientists have pinpointed what wiped out the mysterious 'Hobbit' humans of Indonesia 50,000 years ago, and the answer is a chilling parallel to today's climate crisis. On the physics frontier, researchers created a miniature universe from ultracold atoms and demonstrated that time itself may not be a fundamental feature of reality — it might emerge from quantum processes. In medical news, a hidden immune mechanism triggered by mRNA cancer vaccines could dramatically improve how doctors target and treat tumors. Plus, one of Arizona's largest reservoirs has collapsed to nearly empty, glacial earthquakes are rattling Antarctica's most dangerous glacier, and baby rattlesnakes may not be as deadly as everyone thought.

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