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Weaker Atlantic currents bring more oxygen to tropical ocean’s shallow depths
How is ventilation at various depth layers of the Atlantic connected and what role do changes in ocean circulation play? Researchers from Bremen, Kiel and Edinburgh have pursued this question and their findings have now been published in Nature Communications.
Salt water in the oceans is not the same everywhere; there are water layers that have different salinities and temperatures. The phenomenon of thermohaline circulation—which results from the differences in density caused by variations in temperature and salinity—drives the Atlantic Meridional Overturning Circulation (AMOC), among other current patterns. Near the surface, however, ocean circulation is also influenced by winds, which are responsible for producing the large subtropical gyres in the Atlantic, both on the northern and southern sides of the equator.
These gyres play an important role in marine ecosystems because they provide organisms on the sea floor with oxygen, which is then consumed in part by the decomposition of organic matter. If there is a paucity of fresh, cold, and oxygen-rich water transported in to ventilate these areas, so to speak, oxygen minimum zones result.
Engineering functional liver organoids with organ-specific vasculature
Liver organoids with proper blood vessel networks have been successfully produced, as reported by researchers from Institute of Science Tokyo and Cincinnati Children’s Hospital Medical Center. This advancement addresses a major challenge in replicating the liver’s complex vasculature in lab-grown tissues. Using a novel 3D culture system, the researchers achieved the self-organization of four distinct precursor cell types into functional organoids, capable of producing essential clotting factors in a haemophilia A mouse model.
Over the past decade, organoids have become a major focus in biomedical research. These simplified, lab-grown organs can mimic important aspects of human biology, serving as an accessible and powerful tool to study diseases and test drugs. However, replicating the intricate arrangements and networks of blood vessels found in real organs remains a major hurdle. This is especially true for the liver, whose metabolic and detoxification functions rely on its highly specialized vasculature.
Because of such limitations, scientists haven’t fully tapped into the potential of liver organoids for studying and treating liver diseases. For example, in hemophilia A, a condition where the body cannot produce enough of a critical clotting factor, current treatments often involve expensive and frequent injections. An ideal long-term solution would restore the body’s ability to produce its own clotting factors, which could, in theory, be achieved using liver organoids with fully functional blood vessel structures called sinusoids.
8 Babies Born in UK Using Radical ‘Three Parent’ IVF Technique
Eight healthy babies have been born in the UK using a new IVF technique that successfully reduced their risk of inheriting genetic diseases from their mothers, the results of a world-first trial said Wednesday.
The findings were hailed as a breakthrough which raises hopes that women with mutations in their mitochondrial DNA could one day have children without passing debilitating or deadly diseases on to the children.
One out of every 5,000 births is affected by mitochondrial diseases, which cannot be treated, and include symptoms such as impaired vision, diabetes and muscle wasting.
The new algorithm allows different AIs «to talk» to each other and work together
Canadian researchers from the Weizmann Institute and Intel Labs have presented a new algorithm that allows different AI models unite and work together to increase efficiency and reduce costs.
Meta is trying to win the AI race. A new partnership with AWS could help
For Silicon Valley giants, getting ahead in the artificial intelligence race requires more than building the biggest, most capable models; they’re also competing to get third-party developers to build new applications based on their technology.
Now, Meta is teaming up with Amazon’s cloud computing unit, Amazon Web Services, on an initiative designed to do just that.
The program will provide six months of technical support from both companies’ engineers and $200,000 in AWS cloud computing credits each to 30 US startups looking to build AI tools on Meta’s Llama AI model. The partnership is set to be unveiled at AWS Summit in New York City on Wednesday.
OpenAI researchers who worked on o3 and deep research models are joining Meta Superintelligence Labs
Meta has reportedly acquired two more high-profile researchers from OpenAI, Jason Wei and Hyung Won Chung, as part of its effort to advance in the field of artificial general intelligence.