The First Exoplanet Whose Surface We Have Actually Seen
For the first time, the James Webb Space Telescope has read the bare rock of a world 48.5 light-years away. LHS 3844 b is a dark, hot, airless slab of basalt, and what it tells us about life is written in what is missing.
Read article
Saturn Kept Changing Its Day, and the Planet Was Never the Culprit
For four decades, every spacecraft that visited Saturn seemed to clock a different length of day, an impossibility for a spinning world. The answer did not come from watching the planet turn. It came from listening to its rings, and finally, from mapping the glow of its aurora with the James Webb Space Telescope.
The Death Star Moon Was Hiding an Ocean. Nobody Saw It Coming.
Mimas is 400 kilometers across, dominated by a crater so large the impact nearly broke it apart, and looks exactly like a frozen dead world should. In February 2024, a careful analysis of thirteen years of Cassini data showed it has a global subsurface ocean, and that ocean is no more than 25 million years old.
Every Living Thing on Earth Descended From One Cell. We Now Know Roughly Where It Lived.
Three billion years ago, perhaps four, a single cell at the bottom of an ocean was the ancestor of every plant, animal, fungus, and microbe ever to exist. A 2024 paper has dated it more precisely than any analysis before.
The Universe Is Expanding at Two Different Speeds, and Cosmology Cannot Reconcile Them
Two independent methods measure how fast the universe is expanding. They agree on the technique but disagree on the answer by ten percent. The discrepancy has been growing for a decade. It now exceeds the threshold for a crisis.
The Closest Star About to Explode Has a Hidden Companion
Betelgeuse is 650 light-years away, one thousand times the diameter of the Sun, and visibly twinkling above your head every clear winter night. For decades it has confused astronomers with cycles no one could explain. In 2024, two teams finally found why, and it is a small star, hidden in the glare.
The Day a Refrigerator-Sized Spacecraft Punched an Asteroid Into a New Orbit
On September 26, 2022, a 610-kilogram spacecraft slammed into a 160-meter asteroid at 22,000 kilometers per hour. The goal was to nudge its orbit by 73 seconds. The actual result exceeded the benchmark by a factor of twenty-five.
The Day Two Black Holes Released More Energy Than Every Star in the Observable Universe Combined
On September 14, 2015, LIGO recorded the final 0.2 seconds of a collision that had been a billion years in the making. The peak luminosity exceeded the combined light output of every star in every galaxy in the observable cosmos by a factor of fifty.
Sixty-Eight Dead Stars Just Detected the Background Hum of the Universe
Earth is bobbing up and down in a sea of gravitational waves that stretches from one end of the cosmos to the other. We have no instrument on Earth big enough to detect them. So NANOGrav built one out of pulsars.
The Asteroid Sample That Brought Back Almost Every Ingredient for Life
Fifteen of the twenty amino acids life uses. All five DNA and RNA bases. Ribose. Glucose. And a polymer never seen anywhere else in space. NASA opened a 121-gram sample from a 500-meter asteroid and found pieces of the chemistry that built every living thing on Earth.
The Third Object From Another Star System Survived Its Closest Pass to Our Sun
It was discovered in July 2025. In October it vanished behind the Sun. When it came out the other side, it had survived perihelion, and it was nothing like the comets that formed with our solar system.
The Force Holding the Universe Apart May Already Be Dying
For thirty years, dark energy has been the most powerful force in cosmology, a steady push driving every galaxy apart forever. In April 2025, a five-year survey of fifteen million galaxies returned a result the standard model cannot explain.
Seven Earth-Sized Worlds Around One Star, and What James Webb Just Found Out About Them
TRAPPIST-1 has seven Earth-sized planets at 40 light-years from Earth. Three sit in the habitable zone. JWST has spent two years probing their atmospheres. The picture is clarifying, and uncomfortable in places.
A Physicist Spent Two Years Cleaning Up Old Telescope Data. What Was Left Might Be the First Sight of Dark Matter.
92 years after Fritz Zwicky first identified dark matter, a 2025 paper by Tomonori Totani at the University of Tokyo claims to see its gamma-ray signature in 15 years of Fermi-LAT archival data. If the result holds up, the longest-standing problem in physics has finally cracked.
What Actually Happened to NASA's Return to the Moon
Artemis was announced in 2017 with a goal of landing on the Moon by 2024. In 2026 the first crewed mission has finally flown, and not to the surface. The original landing has been quietly redefined, a different upper stage has been chosen, and a geopolitical race with China is reshaping everything.
We Caught a Star Exploding, and Saw the Shape of the Blast for the First Time
On April 11, 2024, ATLAS detected a supernova within hours of explosion. A Beijing team raced to commandeer the VLT in Chile to measure its geometry, and what they found may rewrite 50 years of theory about how stars die.
We Have Only Visited Uranus Once, and Almost Everything We Learned That Day Was Wrong
Voyager 2 flew past Uranus in 1986 during a freak solar event. A 2024 reanalysis shows that what we have believed about the planet for forty years was a snapshot of the wrong moment.
What Is the Universe Expanding Into?, and Why the Question Misunderstands Space
It is the most natural question to ask. Galaxies are flying apart. The space between them is growing. So where is it going? The answer turns out to be that the question itself is wrong.
The Worst Day in Earth's History Lasted Two Million Years
252 million years ago, an event the paleontologists now call simply The Great Dying erased 96 percent of all marine species. The cause was something the planet itself did to itself, a slow-motion volcanic eruption in what is now Siberia.
How Far Back in Earth's History Could a Human Community Actually Survive?
Take a hundred modern humans, give them stone-age tools, and drop them into a random point in Earth's 4.6 billion-year history. The honest floor is roughly 298 million years ago. Anything earlier, and the air itself would kill them.
The Collision That Made the Moon, and the Habitable Planet Underneath It
About 4.5 billion years ago, an object roughly the size of Mars struck the proto-Earth. The collision was the most violent event in our planet's history. It also made the modern Earth habitable.
The Largest Spiral Galaxy We've Ever Found, and the Smaller Galaxy That's Quietly Tearing It Apart
NGC 6872 is roughly 522,000 light-years across, more than five times the diameter of the Milky Way. The reason it is that large is a smaller galaxy named IC 4970, which has been gravitationally pulling at its outer arms for roughly 130 million years.
The Deepest Place on Earth Tells Us What to Look For on Europa
At 10,935 meters down, in pitch darkness and pressure that would crush a submarine, life persists. Tube worms grow two meters long around hydrothermal vents that exist on no map. The same kind of vent, the same chemistry, possibly the same biology, is the leading candidate for where life beyond Earth might exist. Europa Clipper is on its way.
Where Is Everybody?, and Why the Most Famous Question in Astronomy Just Got Quietly Demolished by Math
Enrico Fermi reportedly asked the question over lunch at Los Alamos in 1950. For seventy-five years it has been one of the most cited puzzles in science. In 2018, three Oxford researchers showed with one careful recalculation that the entire premise of the paradox might be wrong, and the universe being silent might mean exactly nothing.
The Particle That Built the Universe Cannot Survive Ten Minutes Alone
A free neutron has a half-life of approximately ten minutes and eleven seconds. Inside an iron nucleus, the same particle is essentially immortal. The 10-minute half-life is the parameter that determined how much helium the Big Bang produced, if it had been five minutes shorter, our universe would be sterile.
The Greatest Idea in Modern Physics Came From a Mathematician the University Refused to Hire
In 1918, Emmy Noether proved that every conservation law in physics comes from a symmetry. Einstein could not get her tenure. The University of Göttingen senate ruled that admitting women would 'overthrow academic order.' Today her theorem underpins everything from particle physics to general relativity, and reveals an uncomfortable truth in cosmology: in our expanding universe, energy is not conserved.
The Strangest Dwarf Planet in the Solar System Is Shaped Like an Egg, Has Two Moons, and Spins Every 3.9 Hours
Pluto is round. Eris is round. Haumea is shaped like an egg because it spins so fast that gravity cannot keep up. It is the only known object beyond Neptune to have rings, and the center of one of the bitterest priority disputes in modern astronomy.
Io Is the Most Violent World in the Solar System, and Juno Just Got Closer Than Anyone in 23 Years
Jupiter's moon Io has 400 active volcanoes, lakes of molten lava, and mountains taller than Everest. The mechanism is not solar heat, it is gravity tearing rock apart in real time. Juno's December 2023 flyby came within 1,500 kilometers, the closest approach since Galileo.
The Largest Things in the Universe Are Things That Shouldn't Exist
The Cosmological Principle says nothing should be larger than about 1.2 billion light-years. The Hercules-Corona Borealis Great Wall is ten billion. Three other structures break the same rule. Astronomers do not yet agree on what to do with them.
How Long Could Humanity Last?, A Cosmic Inventory of Things That Could End Us
Roughly 74,000 years ago, our species nearly went extinct. The list of things that could finish what Toba started is well-catalogued, the timescales are surprisingly precise, and one of the entries is a star that will pass 0.06 light-years from the Sun in roughly 1.3 million years.
The Sun Just Hit Its Peak, and the 1859 Storm That Could Repeat Tomorrow
On September 1, 1859, telegraph operators around the world were knocked out of their chairs by sparks from their equipment. NASA estimates that an event of the same magnitude today would cost between one and two trillion dollars and take a decade to recover from. The Sun is now at the peak of Cycle 25.
How AI Is Quietly Rewriting Astronomy, From Gravitational Waves to a New Einstein Ring
The Vera Rubin Observatory will produce 20 terabytes of imaging per night. Astronomy still functions as a science only because it has, very quietly, handed most of its eyes over to machines, and the machines have already started discovering things humans hadn't thought to look for.
How Black Holes Eventually Die, And the Lab That Glimpsed It Happening
In 1971, Stephen Hawking proved a theorem stating that the surface area of a black hole's event horizon can never decrease. Three years later, he proved himself wrong. The mechanism that makes black holes die has now been observed, not in the sky, but in a chilled laboratory in Israel.
What If Every Black Hole Contains a Universe?
In 1972, the Indian-American physicist Raj Kumar Pathria published a one-page paper in Nature with a single audacious suggestion: the observable universe and a black hole may, mathematically, be the same kind of object. Half a century later, the idea has matured into a serious branch of theoretical cosmology.
The Universe Has Too Little Lithium. And One of Its Stars Is Older Than It Should Be.
Big Bang nucleosynthesis predicts the universe's first three elements with surgical precision. Hydrogen and helium check out. Lithium is off by a factor of three. And in the constellation Libra, one star appears to be slightly older than the universe itself.
There Are Giant Rings in Deep Space, and Nobody Knows What Made Them
In 2019, an astronomer scrawled 'WTF' across the corner of an image. She had spotted a perfectly circular halo of radio waves a million light-years across, with no obvious cause. Five more have been confirmed since. Astronomers have a name for them, three competing theories about what they are, and no agreement on which is right.
Venus Was Earth's Twin for a Billion Years. Then Something Broke.
Venus formed alongside Earth, from the same cloud of dust, at essentially the same moment. Same size. Same mass. Similar composition. Today it is the solar system's hottest planet. A 2023 paper in Nature Astronomy argues that for a billion years, it also had working plate tectonics.
If You Stood on a World in the Pleiades, This Is What You'd See
Messier 45 is the most photographed open cluster in the sky and one of the closest. No planet has ever been confirmed orbiting any of its 1,300 stars. And yet on one of them, a quiet F-type star named HD 23514, colliding embryos appear to be building a planet right now.
The Sound That Shouldn't Exist on Mars, And What It Changes
For decades, scientists sent instruments to Mars specifically designed to find lightning. They found nothing. Then Perseverance, not looking for lightning at all, picked up 55 faint electrical pops buried in 45 months of audio data.
Earth's Oxygen Is Running Out, Just Not on a Human Schedule
The air you are breathing right now took 2.5 billion years to accumulate. It will be gone in roughly 1.08 billion more. A study in Nature Geoscience has calculated, with uncomfortable precision, when Earth's atmosphere will return to the oxygen-starved conditions of the ancient Archaean.
The Dead Star That Shouldn't Be Breathing, And Is
According to everything physicists know, RXJ0528+2838 should not have a shock wave around it. It does, and 12 institutions across seven countries cannot explain why.
Time Is Not What You Think It Is, And Einstein's Physics Can Prove It
You cannot touch it or hold it in your hands. And yet time governs everything you will ever do. Einstein's answer, buried inside one of the most successful theories in history, is stranger than most people realize.
Juno's Last Secrets: What NASA's Most Resilient Probe Revealed About Jupiter
It was supposed to last 20 months. Years after its original mission ended, Juno is still orbiting Jupiter, and nearly everything it found defied what scientists thought they knew.