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A sign of Alzheimer’s… or a sign of something else?ScienceAlert stories are written, fact-checked, and edited by humans, never generated by AI. Don't miss a story, subscribe here.

In a worst-case scenario, category one Lala could dump up to 25in (63cm) of rain on Big Island.

Tayane Dalazen was on a shark-diving trip in Brazil when she was attacked.

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Many fascinating phases in quantum materials emerge when electrons, atoms and other microscopic components begin to act collectively. But these phases do not necessarily appear out of nowhere when a material crosses a transition temperature. Before long-range order develops, microscopic fluctuations can already be present.

Survival skills.ScienceAlert stories are written, fact-checked, and edited by humans, never generated by AI. Don't miss a story, subscribe here.

Here’s what you need to know.ScienceAlert stories are written, fact-checked, and edited by humans, never generated by AI. Don't miss a story, subscribe here.

The fire burning through the major park was described as the country's worst in recent years.

Canine sarcoptic mange (scabies) is a skin condition in which microscopic mites (Sarcoptes scabiei) infest dogs' skin. The condition is contagious and zoonotic and can be difficult to detect. If left untreated, it can cause bleeding sores, malnutrition, emaciation and secondary bacterial infections that may eventually lead to a dog's death.

A new paper published in Physical Review Letters reveals that a leading dark matter candidate—the hypothetical "dark photon"—would not have heated the early universe as previously thought. The finding opens a vast region for experimental searches and could change the hunt for dark matter.

Neptune's moon and ring system stand out among the giant planets because of the strange imbalance between its one very large moon and its many tiny moons. Its largest moon, Triton, makes up more than 99% of the mass of all satellites orbiting the planet while orbiting retrograde compared with Neptune's rotation. The predominant theory is that Triton is a captured Kuiper Belt object that caused a major disruption in Neptune's early moon system. Now, a new study published in Science Advances provides spectroscopic evidence to support this theory.

Rev Paul Cawthorne helped Michael Sheen identify sites where toxic waste was dumped in the 1970s.

Researchers recently confirmed cases of human herpesvirus infection in four lemurs, which died of the infection after having close contact with humans.

Fusion reactors, devices that generate energy by fusing light atomic nuclei at extremely high temperatures, could contribute to ongoing efforts aimed at producing electricity more sustainably. The extreme environment inside these devices, however, can damage materials that surround the superheated, electrically charged plasma where the nuclear fusion reaction takes place.

Over the past two decades, photonic-crystal surface-emitting lasers (PCSELs) have shown promise as a type of advanced semiconductor laser useful in defense- and aerospace-related applications. Typically, these devices are made with photonic crystal patterns that repeat across the area of the device. But new research from the lab of electrical and computer engineering professor Kent Choquette has demonstrated a quasi-periodic photonic-crystal surface-emitting laser (QPCSEL). Fabricated with their buried dielectric platform, the group's device highlights a new avenue for creating tunable, more reliable semiconductor lasers. Their findings appear in Applied Physics Letters.

Our weekly science news roundup.ScienceAlert stories are written, fact-checked, and edited by humans, never generated by AI. Don't miss a story, subscribe here.

Four more belugas have arrived at a Chicago aquarium as part of a plan to move Canada's last remaining captive whales from a shuttered theme park to aquariums in the United States and Spain.

In 2016, archaeologists working at the Phaleron Burial Ground, part of the ancient Attica region, uncovered an astonishing sight: three mass graves dating to the 7th and 6th centuries BCE containing the skeletons of 79 adult men. Many were bound together with metal shackles.

The move follows a chance conversation at the wildlife attraction and replaces imported fish.

In ant colonies, a single ant can be the catalyst for a wave of mob activity, launching brief bursts of coordinated movement involving hundreds or even thousands of swarming workers, according to new simulations from New Jersey Institute of Technology.

Scientists are increasingly relying on powerful data sources and tools that they often cannot fully understand, inspect or verify, according to a new study.

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Social media, self-diagnosis and the glamorization of ADHD

Understanding a cat’s yowl requires looking beyond the noise to the behavior and emotions behind it.

Creepy.ScienceAlert stories are written, fact-checked, and edited by humans, never generated by AI. Don't miss a story, subscribe here.