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All articles tagged with #science and tech

France’s Deepest 16th-Century Shipwreck Uncovered Beneath 8,200 Feet of Water
science-and-tech9 days ago

France’s Deepest 16th-Century Shipwreck Uncovered Beneath 8,200 Feet of Water

Routine French Navy seabed surveys off Ramatuelle revealed Camarat 4, a 16th‑century merchant vessel buried about 8,200 feet deep—France’s deepest wreck. After a sonar hit, an autonomous underwater vehicle and a remotely operated craft captured images of a 98-by-23‑foot ship carrying hundreds of Ligurian-style earthenware pitchers (IHS monogram), yellow plates, anchors, cannons, and other gear. The team believes the cargo points to Liguria’s origin and plans 3D modeling and artifact sampling to study the wreck while avoiding salvage at such depths.

via AOL.com|
#16th-century#france#photogrammetry
Could We Spot a Doomsday Asteroid Before It Strikes?
science-and-tech1 month ago

Could We Spot a Doomsday Asteroid Before It Strikes?

The article asks if humanity could detect an extinction-level asteroid before impact, using the dinosaurs’ 10 km carbonaceous impactor as a case study. It explains that warning time depends on the object’s origin, speed (~21 km/s), and whether it brightens from outgassing; best-case scenarios could offer weeks to a month of naked-eye visibility if the body comes from the night side and becomes bright, but more typical cases might yield only days or hours, or no warning at all if it’s sun-ward or depleted of volatiles. It also highlights how albedo and orbital geometry affect detectability, and stresses the need for planetary defense to gain decades of lead time for meaningful intervention.

via Big Think|
#albedo#asteroid#chicxulub
Interstellar Comet 3I/ATLAS Points to a Cosmos Older Than the Solar System
science-and-tech2 months ago

Interstellar Comet 3I/ATLAS Points to a Cosmos Older Than the Solar System

New observations of interstellar comet 3I/ATLAS from JWST and other telescopes confirm its interstellar origin and reveal chemical fingerprints—a red, cosmic-ray–processed surface; unusually high deuterium abundance and a carbon-12 to carbon-13 ratio far lower than Solar System values—that point to formation in a cold, primitive environment long before our Solar System, making 3I/ATLAS billions of years older than the Sun; its orbit alone cannot determine its age.

via Big Think|
#astronomy#comets#deuterium
Crew-12 Sheltered in Dragon as ISS air leaks prompted safety pause, then resumed operations
science-and-tech2 months ago

Crew-12 Sheltered in Dragon as ISS air leaks prompted safety pause, then resumed operations

NASA ordered the ISS Crew-12 team to shelter inside the docked Crew Dragon after Russian repairs uncovered air leaks in the Zvezda module, with leaks rising to about two pounds of air per day; after about 90 minutes, NASA said the crew should end the safe‑haven status and return to planned ISS operations as Roscosmos continued repairs. The episode underscores ongoing discussions between NASA and Roscosmos about the leaks’ cause, and, despite this temporary safety drill, the ISS has not evacuated in its 27-year history. Crew-12 comprises NASA astronauts Jack Hathaway and Jessica Meir, ESA astronaut Sophie Adenot, Russian cosmonaut Andrey Fedyaev, and NASA astronaut Chris Williams.

via Yahoo|
#air-leaks#dragon-spacecraft#international-space-station
Gravitational Wave Astronomy Matures Into a Fully-Fledged Science
science-and-tech2 months ago

Gravitational Wave Astronomy Matures Into a Fully-Fledged Science

Gravitational wave astronomy has matured from a rare detection to a fully developed science: by mid-2026 there are 390 confirmed events across four detectors (LIGO, Virgo, KAGRA), boosted by upgrades and the addition of LIGO India (beginning around 2030) with space-based prospects like LISA on the horizon. The growing catalog enables population studies of stellar-mass black holes and neutron stars, improved sky localization, and stringent tests of general relativity, signaling a collaborative, high-impact future for gravitational wave science.

via Big Think|
#astronomy#black-holes#gravitational-waves
Old seizure medicine shows potential to prevent Alzheimer's decades before symptoms
science-and-tech5 months ago

Old seizure medicine shows potential to prevent Alzheimer's decades before symptoms

Northwestern University researchers report that levetiracetam, a long-used anti-seizure drug, may prevent Alzheimer’s by blocking the production of amyloid-beta 42, the protein linked to plaques, with results seen in animal models and cultured human neurons (and post-mortem Down syndrome brain tissue). If taken decades before symptoms, it could theoretically slow or prevent disease, though there are no human trials yet and the evidence is observational; researchers caution that the drug would need to start very early and are pursuing longer-lasting formulations and trials, including in genetic forms of Alzheimer’s.

via AOL.com|
#alzheimers-disease#alzheimers-prevention#amyloid-beta
Hidden Plates at U.S. Seismic Hotspot Could Spark Magnitude-8 Quakes
science-and-tech6 months ago

Hidden Plates at U.S. Seismic Hotspot Could Spark Magnitude-8 Quakes

Scientists found that California’s Mendocino Triple Junction, a hotspot where three tectonic plates meet, actually comprises five moving plates (including two hidden ones). Using a network of seismometers, researchers revealed under-surface configurations and a shallower subduction zone, suggesting the area’s quake risk may be higher than previously thought and could trigger magnitude-8 earthquakes, with implications for millions in the region and offering context for past events like the 1992 Humboldt County quake.

via AOL.com|
#california-earthquakes#earthquake-risk#hidden-plates