Webb Finds the Same Young Galaxies More Than Once
A new Webb image shows a galaxy cluster multiplying the appearance of distant galaxies. Gravity, not a cosmic photocopier, made the copies.
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A new Webb image shows a galaxy cluster multiplying the appearance of distant galaxies. Gravity, not a cosmic photocopier, made the copies.
Lineage tracing in mouse embryos found two separate brain progenitors — one for the forebrain and midbrain, one for the hindbrain — emerging at the same moment. The brain may be a composite organ, not a single build.
On the day Hubble completed its 200,000th orbit, it pointed at a galaxy cluster waiting for a star explosion to reappear through a gravitational lens.
A single-celled organism from Lassen's hot springs can divide at 63°C. The record concerns complex cells — not every kind of life, and not proof of life on another world.
Perseverance reached an ancient Martian shoreline and found the wrong kind of rock. Its minerals now point to repeated encounters with groundwater, lake water and later heat.
Iron in an X-ray spectrum has betrayed gas plunging toward a neutron star. The suspected fuel supply for powerful flares is finally showing its direction of travel.
A sweeping re-analysis of meteorite isotopes says Earth was assembled entirely from inner-Solar-System material, with almost nothing smuggled in from beyond Jupiter. That upends how we explain our oceans.
A tiny, three-pound wildcat hiding in Bolivia's cloud forests is the first new feline species named in more than a hundred years.
An asteroid fragment gouged a 222-metre crater into the Moon in early 2024 and nobody saw it happen. NASA's orbiter only found the scar a year and a half later.
Elias 2-24 b is less than a million years old and already about as massive as Jupiter. Its confirmation inside a dusty disk leaves standard planet-building models racing to catch up.
A 70-million-year-old marine reptile from Egypt carried unusually slender jaws, more than 20 teeth per side and a ring-shaped ear bone. It shared the sea with a close relative without hunting the same way.
ATLAS has found evidence for a Higgs decay expected only about once in every 10,000 cases. One photon escapes intact while another exists briefly enough to split into charged matter.
It spins once every 19.46 minutes, yet its surface barely follows day and night. JWST data show asteroid 2024 YR4 moving heat into a broad, nearly even-temperature belt.
The Moon may hide a billion tonnes of water ice near its poles. A new calculation says even that generous reserve would not keep a million-person city alive for long.
A radio source appeared after decades of silence, brightened, faded and returned. Its suspected outflow races at about 2,000 kilometres per second while the source itself barely grows.
Venus looks pale from afar, yet its clouds swallow ultraviolet light with astonishing force. A new model says the hidden absorber must be both powerful and abundant.
Lead nuclei became microscopes at the Large Hadron Collider. At a quarter-proton scale, a familiar shadowing model could not fully explain what disappeared.
Grooves in two Sulawesi skeletons looked like damage without a cause. Chemical traces and experiments point to habitual betel-nut use up to 25,000 years ago.
A glass-bead calibration has redrawn Mercury's chemistry from Earth. The planet's surface may contain up to a quarter less silica than earlier estimates.
Moon-formation models usually turn Theia into an orbiting debris ring. Add realistic rock strength, and one simulation produces an intact Moon within hours.
HR 8799 was the first system with four planets caught on camera. A new JWST analysis says a fifth may be tucked into the star's glare.
Trinidad and Tobago's deep sea was almost a blank chart. The country's first homegrown deep-sea expedition surfaced at least 20 suspected new species.
More than 60,000 bone fragments hid five Denisovan fossils in a cave in Yunnan. Ancient proteins exposed a population whose DNA had vanished.
Astronomers found 84 objects blazing in an awkward gap between ultraviolet and X-rays. They may expose missing supernova ancestors — or an unseen galactic population.
Webb and Hubble found 27 of the faintest worlds beyond Neptune. Their surfaces still carry the colour families of the early solar system.
Moons crowd our solar system, yet no exomoon has survived every test. A new audit shows how stability and telescope limits erase the signal.
Hubble found a third family of ancient star clusters inside the Milky Way. They are the surviving fingerprints of a major merger 11.8 billion years ago.
A flash of warped starlight exposed a planet-sized object with no close star. For the first time, astronomers measured the mass of such a wanderer directly.
Webb found water and fresh silicate dust around a dying star only 0.55 light-years from Sagittarius A*. The galactic centre is hostile, but not chemically sterile.
A particle that vanishes almost instantly has undergone its sharpest symmetry test yet. Quantum entanglement let physicists look for an electric lean that new physics could amplify.
Hubble has watched a decagon sharpen around Saturn's south pole. The ten-sided wave reaches through several atmospheric layers and appears to be new.
LUX-ZEPLIN found one unusually energetic nuclear recoil where almost nothing should appear. It is not a dark-matter discovery, but the background has not explained it away.
Black tumours spreading through a border lake are not repeatedly forming inside fish. Genomes show the cancer cells themselves are moving between hosts.
NASA's newest space telescope has begun a million-mile voyage with a 300-megapixel eye. Its daily data flood is built to catch what narrow surveys miss.
A 550-million-year-old tube fossil carries an isotope signature seen in modern chemosymbiotic worms. Early animals may have recruited bacterial partners before the Cambrian explosion.
A 324-million-year-old insect relative carried six walking legs and a second set of paddle-like abdominal limbs. The fossil captures life halfway out of the water.
Sixteen years of spacecraft tracking reveal that Mars flexes unevenly under the Sun. The wobble points to a deep southern mantle hundreds of degrees warmer than the north.
A neural reconstruction turned 116 radio snapshots into a continuous movie of plasma racing from a distant black hole. The bright knots may not be the shocks astronomers assumed.
Grains returned from asteroid Ryugu contain several nitrogen compounds gathered around ancient salts. The chemistry points to a tiny world where the last water became the most reactive.
The Tasmanian tiger looked dog-headed, but a new 3D analysis finds no living predator with the same cranial toolkit. Its bite belonged to a vanished style of hunting.
Life normally translates 64 codons through one near-universal dictionary. An automated cell-free system can now build and test radically compressed alternatives.
A record microlensing survey finds that small worlds are common on wide, cold orbits. Our neat split between inner rocks and outer giants may be the odd arrangement.
Complex carbon molecules fill space, but the known chemistry was too slow to make enough of them. A laboratory reaction has found a faster route.
Mineral grains older than the planets have preserved a magnetic field from the Solar System's first 200,000 years. Gravity may not have built the Sun alone.
NASA's Pandora telescope has begun watching at least 20 exoplanets. It separates stellar noise from atmospheric signals that could otherwise make water appear — or disappear — in their skies.
Two hydrothermal vent fields have been found inside a vast Atlantic fault system. Their plumbing appears to combine volcanic heat with a second engine hidden in mantle rock.
Comet 220P/McNaught was supposed to need a telescope. Two unexplained outbursts have made it about 20,000 times brighter than usual — and nobody yet knows what cracked the switch.
JWST has found a population of faint, low-mass stars inside distant galaxies. If the signal holds across the early universe, some cosmic heavyweights have been dramatically undercounted.
In 2029, Apophis will skim past Earth closer than geostationary satellites. The planet's gravity will turn the safe flyby into a full-scale experiment on an asteroid.
Two nearly transparent crustaceans have emerged from groundwater caves in Japan's Ryukyu Islands. One lived in a submerged cave where fresh and salt water meet.
Two rises on the Moon have been identified as enormous shield volcanoes. Their slopes are so slight that impact scars and younger lava helped them disappear into the landscape.
Giant tracks preserved in an ancient Brazilian desert point to a mammal relative far larger than the usual dinosaur-age stereotype. The bones are missing, but the footsteps are not.
Two human-shaped phantoms flew around the Moon, but only one wore armour. Their detectors suggest a fitted vest could sharply cut the dose from a major solar storm.
X-rays leaving an intensely magnetic dead star carried a pattern ordinary surface models could not explain. The best fit says the vacuum itself reshaped the light.
Astronomers have found a star racing close enough to the Milky Way's central black hole to feel it twist spacetime. The next close pass could turn that distortion into a measurement.
The Vera C. Rubin Observatory has found its first ultra-faint Milky Way satellite candidate. Aquarius IV is so dim that astronomers still need to prove it is a galaxy at all.
A nearby cosmic lookalike suggests some of Webb's mysterious little red dots are not lonely points at all. Their host galaxies may simply vanish into the observational dark.
The narwhal's famous tusk does not get its strength from one simple twist. X-ray imaging reveals opposing helices nested from the nanoscale upward.
Astronomers looked beyond the Helix Nebula's famous eye and found numerous bow shocks in the darkness. The dying star's debris may already be colliding with — and returning to — interstellar space.
A thin trail of stars in an ultra-diffuse galaxy appears to be the first globular-cluster stream detected beyond the Milky Way. Its shredded shape is already weighing an invisible halo.
A red point from cosmic dawn is too bright to be a star and too strange to be an ordinary galaxy. The leading explanation is a black hole wrapped in a solar-system-sized shell of hydrogen.
A map of more than 30,000 molecular clouds reveals enormous waves rolling through the Milky Way's outer disk. Our galaxy is warped, corrugated and anything but still.
Juno has directly detected trihydrogen ions escaping above Jupiter's poles at more than escape velocity. The giant planet's aurora is also a launch system.
A faint X-ray flash exposed the instant a dying star's shock wave broke through its surface. What followed looked like a familiar cosmic blast with one major piece missing.
Thirteen years of telescope exposures have become a 5.6-trillion-pixel map covering roughly three-quarters of the sky. Nearly four billion objects are now open for anyone to inspect.
Webb's infrared view of the Lion Nebula shows a dead star erasing dust while dense clumps shelter material behind them. The celestial face is still changing.