Showing 20 articles starting at article 201

< Previous 20 articles        Next 20 articles >

Categories: Biology: Developmental, Space: Exploration

Return to the site home page

     (via sciencedaily.com)     Original source 

Astronomers have discovered a planet between the sizes of Earth and Venus only 40 light-years away.

     (via sciencedaily.com)     Original source 

While thousands of planets have been discovered around other stars, relatively little is known about them. A NASA catalog featuring 126 exotic, newly discovered worlds includes detailed measurements that allow for comparisons with our own solar system.

     (via sciencedaily.com)     Original source 

Multicellular organisms, like animals and plants, have complex cells with diverse functions. This complexity arises from the need for cells to produce distinct proteins that interact with each other. This interaction is crucial for cells to carry out their specific tasks and to form complex molecular machinery. However, our current understanding of such protein-protein interactions often lacks cellular contexts because they were usually studied in an in vitro system or in cells isolated from their tissue environment. Effective methods to investigate protein-protein interactions in a tissue-specific manner are largely missing.

     (via sciencedaily.com)     Original source 

The first scientific pictures from the Euclid satellite mission have revealed more than 1,500 billion orphan stars scattered throughout the Perseus cluster of galaxies.

     (via sciencedaily.com)     Original source 

Astronomers have made the rare and tantalizing discovery of an Earth-like exoplanet 40 light-years away that may be just a little warmer than our own world. The potentially-habitable planet, named Gliese 12 b, orbits its host star every 12.8 days, is comparable in size to Venus -- so slightly smaller than Earth -- and has an estimated surface temperature of 42 C (107 F), which is lower than most of the 5,000-odd exoplanets confirmed so far. That is assuming it has no atmosphere, however, which is the crucial next step to establishing if it is habitable.

     (via sciencedaily.com)     Original source 

Treatment of autoimmune diseases like lupus has long relied on steroids to knock down the immune system, but more targeted therapies are currently undergoing clinical trials. To make sure these therapies get to the patients who will benefit, work is needed to identify the specific mutations behind each patient's disease. Researchers now report several dozen mutations associated with oversensitive toll-like receptors -- a major cause of autoimmune disease -- and linked two mutations to patients.

     (via sciencedaily.com)     Original source 

Animals and fungi predominantly use two different modes of cell division -- called open and closed mitosis, respectively. A new study has shown that different species of Ichthyosporea -- marine protists that are close relatives of both animals and fungi -- use either open and closed mitosis, closely correlated to whether the species has multinucleate life cycle stages. The study demonstrates the way animals do cell division might have evolved long before animals themselves did and how this is linked to an organism's life cycle.

     (via sciencedaily.com)     Original source 

Researchers found that adding a newly developed modified sugar, BNAP-AEO, to gapmer antisense oligonucleotides (ASOs) increased their affinity for target RNAs, thus significantly enhancing their gene-silencing effects in vitro and in vivo. The BNAP-AEO modification also decreased gapmer ASO toxicity to the central nervous system (CNS), suggesting that it could improve the clinical application of ASO treatment of CNS disease.

     (via sciencedaily.com)     Original source 

Astronomers have a new way to measure how fast a black hole spins, by using the wobbly aftermath from its stellar feasting. The results offer a new way to probe supermassive black holes and their evolution across the universe.

     (via sciencedaily.com)     Original source 

Researchers trained an AI model to accurately predict male fruit flies' courtship behavior in response to any sight of a female. This breakthrough offers new insight into how the brain processes visual data and may someday pave the way for artificial vision technology.

     (via sciencedaily.com)     Original source 

Researchers describe cell-in-cell phenomena in which one cell engulfs and sometimes consumes another. The study shows that cases of this behavior, including cell cannibalism, are widespread across the tree of life. The findings challenge the common perception that cell-in-cell events are largely restricted to cancer cells. Rather, these events appear to be common across diverse organisms, from single-celled amoebas to complex multicellular animals.

     (via sciencedaily.com)     Original source 

Two new studies detail the changes seen at the single-cell level in pig organs and recipient human bodies before, during, and just after the xenotransplantation surgeries in the decedents.

     (via sciencedaily.com)     Original source 

A surprisingly low amount of methane and a super-sized core hide within the cotton candy -- like planet WASP-107 b.

     (via sciencedaily.com)     Original source 

From the small ossicones on a giraffe to the gigantic antlers of a male moose -- which can grow as wide as a car -- the headgear of ruminant hooved mammals is extremely diverse, and new research suggests that despite the physical differences, fundamental aspects of these bony adaptations likely evolved from a common ancestor.

     (via sciencedaily.com)     Original source 

Two newly discovered mechanisms in bacteria have been identified that can contribute to the development of antibiotic resistance. Changing the number of copies of resistance genes in bacteria increases antibiotic resistance, and can do so very quickly. These two mechanisms, along with a third known mechanism, can occur independently of each other, even within the same bacterial cell.

     (via sciencedaily.com)     Original source 

A new study of prion diseases, using a human cerebral organoid model, suggests there is a substantial species barrier preventing transmission of chronic wasting disease (CWD) from cervids -- deer, elk and moose -- to people. The findings are consistent with decades of similar research in animal models.

     (via sciencedaily.com)     Original source 

Plants have special corrective molecules at their disposal that can make retrospective modifications to copies of genes. However, it would appear that these 'Tipp-Ex proteins' do not have permission to work in all areas of the cell, only being used in chloroplasts and mitochondria. A study has now explained why this is the case. It suggests that the correction mechanism would otherwise modify copies that have nothing wrong with them, with fatal consequences for the cell.

     (via sciencedaily.com)     Original source 

If fruit fly wings do not develop into the right shape, the flies will die. Researchers have learned how fly embryo cells develop as they need to, opening a window into human development and possible treatments for birth defects.

     (via sciencedaily.com)     Original source 

A molecular biologist may have found a new 'rule of biology.' The rule challenges long-held notions that most living organisms prefer stability over instability because stability requires less energy and fewer resources.

     (via sciencedaily.com)     Original source 

Looking like a glittering cosmic geode, a trio of dazzling stars blaze from the hollowed-out cavity of a reflection nebula in a new image from NASA's Hubble Space Telescope. The triple-star system is made up of the variable star HP Tau, HP Tau G2, and HP Tau G3. HP Tau is known as a T Tauri star, a type of young variable star that hasn't begun nuclear fusion yet but is beginning to evolve into a hydrogen-fueled star similar to our Sun.