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How to unsnarl a tangle of threads, according to physics

A jiggling robot has revealed the ideal vibrating speed to free jumbled fibres




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The odds of quantum weirdness being real just got a lot higher

An experiment to test distant particles’ ability to correlate their behaviour is one of the strongest pieces of evidence that classical ideas about reality are incorrect




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This antimatter version of an atomic nucleus is the heaviest yet

Smashing gold nuclei together at high speeds billions of times has resulted in 16 particles of antihyperhydrogen-4, a very exotic and heavy form of antimatter




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We can diagnose an object’s quantumness from the way it radiates heat

To determine an object’s quantum properties, you may only need to measure how it exchanges heat with its environment, without touching the object itself




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Quantum holograms can send messages that disappear

Entangled particles of light can transmit holographic images that can be selectively erased, allowing for secure communications that can also be deleted




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Can we solve quantum theory’s biggest problem by redefining reality?

With its particles in two places at once, quantum theory strains our common sense notions of how the universe should work. But one group of physicists says we can get reality back if we just redefine its foundations




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Cause and effect may not actually be muddled in the quantum realm

The direction of cause and effect was brought into question for quantum objects more than a decade ago, but new calculations may offer a way to restore it




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Our reality seems to be compatible with a quantum multiverse

Even though the strange behaviour we observe in the quantum realm isn’t part of our daily lives, simulations suggest it is likely our reality could be one of the many worlds in a quantum multiverse




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Freak waves may be more dangerous than we thought possible

Experiments in a state-of-the-art wave tank suggest we have underestimated the potential size and power of rogue waves and the risk they pose to offshore infrastructure




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Light has been seen leaving an atom cloud before it entered

Particles of light can spend "negative time" passing through a cloud of extremely cold atoms – without breaking the laws of physics




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We physicists could learn a lot by stepping beyond our specialisms

A recent atomic physics workshop was outside my dark matter comfort zone, but learning about science beyond my usual boundaries was invigorating, says Chanda Prescod-Weinstein




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Why the words we use in physics obscure the true nature of reality

Simple words like "force" and "particle" can mislead us as to what reality is actually like. Physicist Matt Strassler unpacks how to see things more clearly




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This test could reveal whether gravity is subject to quantum weirdness

If gravity is a truly quantum entity, something as simple as measuring the strength of an object’s gravitational field should change its quantum state




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Tiniest 'ruler' ever measures distances as small as an atom's width

A new technique uses glowing molecules, laser light and microscopes to measure distances as minuscule as 0.1 nanometres – the width of a typical atom




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Quantum theory is challenging long-standing ideas about entropy

A mathematical study finds that three definitions of what it means for entropy to increase, which have previously been considered equivalent, can produce different results in the quantum realm




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How a simple physics experiment could reveal the “dark dimension”

Could the universe's missing matter be hiding in a "dark" extra dimension? We now have simple ways to test this outlandish idea - and the existence of extra dimensions more generally




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The laws of physics appear to follow a mysterious mathematical pattern

The symbols and mathematical operations used in the laws of physics follow a pattern that could reveal something fundamental about the universe




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Heat can flow backwards in a gas so thin its particles never touch

A surprising reversal of our usual understanding of the second law of thermodynamics shows that it may be possible for heat to move in the “wrong” direction, flowing from a cold area to a warm one




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Launching a huge dust cloud from the moon could ease global warming

Launching a million tonnes of moon dust around Earth could dim sunlight across our planet by 1.8 per cent. This would reduce the global temperature, but whether it would be worth the resources, and the risks involved in such a strategy, are unclear




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Gold hydrogen: Is there a huge reserve of clean fuel in Earth's crust?

Geologists think there may be vast natural stores of hidden hydrogen gas within Earth, but no one is sure how much there is or how much could be recovered for energy




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Earliest evidence of a meteorite hitting Earth found in Australia

Tiny pieces of stone found in a rock formation in Western Australia may be the oldest evidence of a meteorite impact on Earth, dating back nearly 3.5 billion years




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Oxygen on early Earth may have come from quartz crushed by earthquakes

Billions of years ago, crushed quartz reacting with water could have created the conditions needed for the evolution of the photosynthetic microbes responsible for most of the oxygen now in Earth’s atmosphere




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Next 10,000 years of Greenland ice sheet could be decided this century

Carbon emissions within the next 50 years could lead to a tipping point where large parts of the Greenland ice sheet melt over the next 10,000 years




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Shiveluch volcano eruption in Russia smothers nearby villages in ash

The eruption of the Shiveluch volcano on the Kamchatka Peninsula in Russia on 11 April sent plumes of volcanic ash many kilometres into the air and could affect flights




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These bizarre lights in the sky hint at a way to predict earthquakes

Semi-mythical "earthquake lights" may be accompanied by changes to Earth's magnetic field. Now researchers say these changes could be used to forecast major tremors




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Prehistoric Planet 2 review: Attenborough returns to ancient Earth

The second series of this show about Earth 66 million years ago is a joy to watch - but it inspires more than it informs. A little more science would have been nice




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Dried-up lake may explain why California is 'overdue' major earthquake

Pressure on the San Andreas fault from a now-dried lake could have been sufficient to trigger past major earthquakes in California. The lake’s disappearance could explain why there have been no such quakes for nearly 300 years




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Kīlauea volcano: Watch live footage of the eruption in Hawaii

The Kīlauea volcano in Hawaii has begun erupting, spewing volcanic gas and ash across the island




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See some of the images up for the Earth Photo 2023 competition

From a photograph of algae choking an Indian river to a shocking depiction of the wearing away of the UK coast, these are some of the pictures in the running for the contest




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Humans have pumped so much groundwater, we’ve shifted Earth’s axis

Changes in the distribution of groundwater around the planet between 1993 and 2010 were enough to make Earth's poles drift by 80 centimetres




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There's a gravity 'hole' in the Indian Ocean and now we may know why

Earth appears to have less mass beneath a certain part of the Indian Ocean compared with the rest of the planet. Plumes of magma at the location could explain why




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Stunning image of erupting volcano reminds us of Earth’s violent past

This photo of Tungurahua, a volcano exploding in the Ecuadorian night, comes from an illustrated book to accompany a TV series about Earth’s deep history




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GPS could predict earthquakes two hours ahead, but there's a catch

An analysis of GPS data has revealed a slow and otherwise undetectable slip of tectonic plates that begins two hours before an earthquake - but detecting this in advance would require more accurate sensors




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Earth is coated in ancient space dust that could be from the moon

A 33-million-year-old layer of Earth's crust is laced with helium-3, which is normally only found in space. Now we might have an explanation for how it got there




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Sea level may have been higher than it is now just 6000 years ago

Climate researchers thought that current global average sea levels were the highest in more than 100,000 years, but new models suggest oceans just 6000 years ago may have been higher than at the beginning of the industrial revolution, and possibly even higher than today




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Tonga volcano unleashed underwater flows that reshaped the seafloor

The destruction of telecommunications cables during the eruption of Hunga Tonga-Hunga Haʻapai volcano in 2022 shows that underwater debris currents can travel at 122 kilometres per hour




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NASA’s UFO task force has released its final report – it’s not aliens

An independent task force formed by NASA to look into unidentified anomalous phenomena found no evidence of alien craft, and suggests that if we want to find proof of visitors we need better data




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Nearly all mammals will go extinct in 250 million years as Earth warms

If humans still exist millions of years from now, they will face inhospitably warm conditions on a supercontinent centred at the equator. Most land mammals won't be able to survive




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Huge earthquake shook Seattle 1100 years ago and it could happen again

Analysis of tree rings shows that two faults near Seattle, Washington ruptured at the same time or soon after each other more than 1000 years ago – a repeat today would cause a major disaster in the region




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Earth’s core is oddly squishy and we may now know why

Earth’s iron-rich inner core may owe some of its surprising softness to the motion of atoms, suggest experiments with iron at high temperature and pressure coupled to AI simulations




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Ancient river valleys discovered beneath Antarctic ice sheet

A better picture of the hidden landscape beneath the frozen surface of Antarctica could help us understand how the ice will respond to climate change




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Bits of an ancient planet called Theia may be buried in Earth’s mantle

Two strange, high-density blobs buried more than a kilometre underground may have come from the ancient world Theia, which is thought to have slammed into Earth to create the moon




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Iceland volcano: 15km magma tunnel under town threatens to erupt

A 15-kilometre-long mass of lava has formed underneath the Reykjanes peninsula in Iceland and could erupt at any time




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Dead spacecraft are seeding the upper atmosphere with metal

The stratosphere seems to be full of aluminium particles and other metals that come from spacecraft burning up in the atmosphere, and those particles could mess up polar clouds




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See a dazzling collection of the year's best northern lights pictures

This spectacular selection of images is taken from the winners of the Northern Lights Photographer of the Year competition, run by Capture the Atlas




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Vast submerged area near Australia may once have hosted 500,000 people

An area of the seabed north of Australia has been mapped in detail for the first time, revealing that large numbers of people could have lived there until it was inundated by rising seas




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World's first tunnel to a magma chamber could unleash unlimited energy

In Iceland, scientists are planning to drill two boreholes to a reservoir of liquid rock. One will give us our first direct measurements of magma – the other could supercharge geothermal power




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Lightning during volcanic eruptions may have sparked life on Earth

Lightning strikes during volcanic eruptions could have provided nitrogen in a form that was needed by early life forms




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Ocean thunderstorms generate the most intense lightning ever observed

An analysis of satellite observations has identified some extreme thunderstorms over the Indian Ocean and Gulf of Mexico with lightning flashes so frequent that the sky would appear continuously lit




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Largest volcanic eruption in recorded history happened 7300 years ago

The Kikai-Akahoya eruption of an underwater volcano off the coast of Japan ejected enough material to fill Lake Tahoe twice, three times as much as the eruption of Mount Tambora in 1815