https://www.sciencedaily.com/news/plants_animals/mice/ The mouse. What have researchers learned from obese mice, anxious mice and cancer-resistant mice? Read research using mouse models of disease. en-us Fri, 06 Mar 2026 02:17:34 EST Fri, 06 Mar 2026 02:17:34 EST 60 https://www.sciencedaily.com/images/scidaily-logo-rss.png https://www.sciencedaily.com/news/plants_animals/mice/ For more science news, visit ScienceDaily. https://www.sciencedaily.com/releases/2026/01/260118233555.htm A deadly fungus that has wiped out hundreds of amphibian species worldwide may have started its global journey in Brazil. Genetic evidence and trade data suggest the fungus hitchhiked across the world via international frog meat markets. The findings raise urgent concerns about how wildlife trade can spread hidden biological threats. Mon, 19 Jan 2026 06:40:08 EST https://www.sciencedaily.com/releases/2026/01/260118233555.htm https://www.sciencedaily.com/releases/2025/12/251202052211.htm Scientists found that adult bristleworm eyes grow continuously thanks to a rim of neural stem cells similar to those in vertebrate eyes. This growth is surprisingly regulated by environmental light via a vertebrate-like c-opsin. The discovery reveals deep evolutionary parallels between distant species and raises questions about how light shapes nervous systems beyond vision. It hints at hidden complexity in creatures long assumed to be simple. Tue, 02 Dec 2025 09:34:07 EST https://www.sciencedaily.com/releases/2025/12/251202052211.htm https://www.sciencedaily.com/releases/2025/11/251104094136.htm Researchers have, for the first time, estimated how quickly E. coli bacteria can spread between people — and one strain moves as fast as swine flu. Using genomic data from the UK and Norway, scientists modeled bacterial transmission rates and discovered key differences between strains. Their work offers a new way to monitor and control antibiotic-resistant bacteria in both communities and hospitals. Tue, 04 Nov 2025 23:25:35 EST https://www.sciencedaily.com/releases/2025/11/251104094136.htm https://www.sciencedaily.com/releases/2025/05/250528132116.htm The protein DNase1 is one of the oldest biological agents in history: It has been on the market since 1958 and is now used, among other things, to treat cystic fibrosis. However, it takes considerable effort to produce it in immortalized hamster cells. This process is also costly. It would be far more cost-effective to produce it with undemanding yeast cells. Wed, 28 May 2025 13:21:16 EDT https://www.sciencedaily.com/releases/2025/05/250528132116.htm https://www.sciencedaily.com/releases/2025/05/250521124803.htm Researchers have shown that gonadotrophs, cells in the pituitary gland with a key role in puberty and reproduction, come from two different populations, with the majority produced after birth rather than in the embryo, as previously thought. Wed, 21 May 2025 12:48:03 EDT https://www.sciencedaily.com/releases/2025/05/250521124803.htm https://www.sciencedaily.com/releases/2025/05/250520121427.htm African elephants are the largest land animals on earth and significantly larger than their relatives in Asia, from which they are separated by millions of years of evolution. Nevertheless, Asian elephants have a 20 percent heavier brain, as scientists were able to demonstrate. They also showed that elephant brains triple in weight after birth. These results provide potential explanations for behavioral differences between African and Asian elephants as well as for the pachyderms' long youth, during which they gain enormous experience and learn social skills. Tue, 20 May 2025 12:14:27 EDT https://www.sciencedaily.com/releases/2025/05/250520121427.htm https://www.sciencedaily.com/releases/2025/05/250514120234.htm The northern white rhinoceros is one of the rarest animals on Earth, with just two females left and no natural way for the species to reproduce. Now, scientists have mapped the entire genome of a northern white rhino. This represents a crucial step toward bringing the critically endangered species back from the edge using advanced reproductive technologies. The complete genome can be used as a reference to analyze the health of previously developed northern white rhinoceros stem cells. Eventually, those stem cells may be able to generate sperm and eggs to yield new rhinos. Wed, 14 May 2025 12:02:34 EDT https://www.sciencedaily.com/releases/2025/05/250514120234.htm https://www.sciencedaily.com/releases/2025/05/250507125659.htm Bacterial resistance negates the effect of antibiotics in the treatment of infection. Using mouse models, researchers now show that if antibiotics are administered with an enzyme called endolysin, the combined effect protects against infection by resistant bacteria in all bodily organs -- including the brain, which antibiotics alone have difficulty reaching. Wed, 07 May 2025 12:56:59 EDT https://www.sciencedaily.com/releases/2025/05/250507125659.htm https://www.sciencedaily.com/releases/2025/05/250501122047.htm Scientists inserted DNA-encoding methylmercury detoxification enzymes into the genome of an abundant human gut bacterium. The engineered bacterium detoxified methylmercury in the gut of mice and dramatically reduced the amount that reached other tissues, such as the brain and liver. Mice given an oral probiotic containing the engineered microbe and fed a diet high in bluefin tuna had much lower methylmercury levels than expected, suggesting that a probiotic might eventually make it safer for people to consume fish. Researchers performed the tests using pregnant mice and found lower levels of methylmercury in both maternal and fetal tissues, and lower signs of mercury toxicity in the fetal brain. Thu, 01 May 2025 12:20:47 EDT https://www.sciencedaily.com/releases/2025/05/250501122047.htm https://www.sciencedaily.com/releases/2025/04/250423120654.htm An international team has identified a potential microbial culprit behind the alarming rise in early-onset colorectal cancer: a bacterial toxin called colibactin. Scientists report that exposure to colibactin in early childhood imprints a distinct genetic signature on the DNA of colon cells -- one that may increase the risk of developing colorectal cancer before the age of 50. Wed, 23 Apr 2025 12:06:54 EDT https://www.sciencedaily.com/releases/2025/04/250423120654.htm https://www.sciencedaily.com/releases/2025/04/250421162825.htm A new way to deliver disease-fighting proteins throughout the brain may improve the treatment of Alzheimer's disease and other neurological disorders, according to scientists. By engineering human immune cells called microglia, the researchers have created living cellular 'couriers' capable of responding to brain pathology and releasing therapeutic agents exactly where needed. Mon, 21 Apr 2025 16:28:25 EDT https://www.sciencedaily.com/releases/2025/04/250421162825.htm https://www.sciencedaily.com/releases/2025/04/250416135344.htm New research shows Glycolysis -- the process of converting sugar into energy -- plays a key role in early development. More than fuel, Glycolysis doesn't just power cells -- it helps steer them toward specific tissue types at critical moments in development. Wed, 16 Apr 2025 13:53:44 EDT https://www.sciencedaily.com/releases/2025/04/250416135344.htm https://www.sciencedaily.com/releases/2025/04/250408121657.htm Researchers have shown that differences in the entire rotavirus genome -- not just its two surface proteins -- affect how well vaccines work, helping to explain why some strains are more likely to infect vaccinated individuals. Tue, 08 Apr 2025 12:16:57 EDT https://www.sciencedaily.com/releases/2025/04/250408121657.htm https://www.sciencedaily.com/releases/2025/03/250326122652.htm Why do some people lose the joy of eating, even when surrounded by irresistible foods? UC Berkeley researchers have uncovered a surprising brain mechanism that explains this paradox. They found that a high-fat diet lowers levels of a peptide called neurotensin, which normally boosts dopamine’s pleasure response. Without it, food loses its appeal — driving people to eat out of habit rather than enjoyment, which can fuel obesity. Wed, 26 Mar 2025 12:26:52 EDT https://www.sciencedaily.com/releases/2025/03/250326122652.htm https://www.sciencedaily.com/releases/2025/03/250319143422.htm Campylobacter infections are the most common foodborne illnesses in the U.S., sickening an estimated 1.5 million people each year. A new study examined records of Campylobacter jejuni infections from 10 states, plotting regional, age-related, and drug-resistance trends from 2013 to 2019. The study found that drug-resistant C. jejuni infections were highest in the 20-39 age group and that quinolone-resistant C. jejuni infections increased from 2013-2019. The researchers also identified regional differences in C. jejuni resistance to quinolones and six other classes of antibiotics. Wed, 19 Mar 2025 14:34:22 EDT https://www.sciencedaily.com/releases/2025/03/250319143422.htm https://www.sciencedaily.com/releases/2025/03/250303191253.htm Obesity rates are set to skyrocket, with one in six children and adolescents worldwide forecast to be obese by 2050, according to a new study. But with significant increases predicted within the next five years, the researchers stress urgent action now could turn the tide on the public health crisis. Mon, 03 Mar 2025 19:12:53 EST https://www.sciencedaily.com/releases/2025/03/250303191253.htm https://www.sciencedaily.com/releases/2025/02/250205165613.htm Could the key to easing anxiety be hidden in our gut? Scientists have discovered a crucial connection between gut microbes and anxiety-related behavior. Their research suggests that microbial metabolites -- specifically indoles -- play a direct role in regulating brain activity linked to anxiety. This finding opens up exciting possibilities for new probiotic-based therapies to improve mental health. Wed, 05 Feb 2025 16:56:13 EST https://www.sciencedaily.com/releases/2025/02/250205165613.htm https://www.sciencedaily.com/releases/2025/01/250128123824.htm A team of stem cell scientists have successfully used embryonic stem cell engineering to create a bi-paternal mouse -- a mouse with two male parents -- that lived until adulthood. Their results describe how targeting a particular set of genes involved in reproduction allowed the researchers to overcome previously insurmountable challenges in unisexual reproduction in mammals. Tue, 28 Jan 2025 12:38:24 EST https://www.sciencedaily.com/releases/2025/01/250128123824.htm https://www.sciencedaily.com/releases/2025/01/250116133311.htm Scientists have made 'exciting,' patient-friendly advances in developing a non-toxic bacterial therapy, BacID, to deliver cancer-fighting drugs directly into tumors. This emerging technology holds promise for very safe and more effective treatment of cancers with high mortality rates, including liver, ovarian and metastatic breast cancer. Thu, 16 Jan 2025 13:33:11 EST https://www.sciencedaily.com/releases/2025/01/250116133311.htm https://www.sciencedaily.com/releases/2024/12/241217131100.htm Near-gap-free and near-error-free genomes of a susceptible bed bug strain and a superstrain with around 20,000-fold insecticide resistance offer the broadest look yet at the full scope of mutations driving their resilience. Tue, 17 Dec 2024 13:11:00 EST https://www.sciencedaily.com/releases/2024/12/241217131100.htm https://www.sciencedaily.com/releases/2024/12/241211124508.htm Gut microbiome composition during pregnancy has long-term effects on offspring stem cell growth and development, researchers report. Treating pregnant mice with a common gut microbe resulted in offspring that had more active stem cells in both the brain and intestinal tract. As a result, the offspring were less anxious and recovered quicker from colitis, and these differences were still evident at 10 months of age. Wed, 11 Dec 2024 12:45:08 EST https://www.sciencedaily.com/releases/2024/12/241211124508.htm https://www.sciencedaily.com/releases/2024/12/241206162112.htm Researchers have identified the first mouse strain that is susceptible to severe COVID-19 without the need for genetic modification. This development marks a pivotal step forward in infectious disease research, providing an essential tool to develop vaccines and therapeutics for future coronavirus variants and potential pandemics. Fri, 06 Dec 2024 16:21:12 EST https://www.sciencedaily.com/releases/2024/12/241206162112.htm https://www.sciencedaily.com/releases/2024/11/241125124920.htm It has been a year ago since bacteria from war-wounded at hospitals in Ukraine were analyzed. The study showed that some of the bacteria types had total resistance to antibiotics. Now, the same researchers have examined the infectiousness of the bacteria. 'The bacterium 'Klebsiella pneumoniae', which is resistant to all antibiotics, is also particularly aggressive and dangerous,' says the lead author of the study. Mon, 25 Nov 2024 12:49:20 EST https://www.sciencedaily.com/releases/2024/11/241125124920.htm https://www.sciencedaily.com/releases/2024/11/241121225902.htm Researchers explore how established agricultural pest management strategies could be adapted to address cancer therapy. The pioneering method opens new possibilities for controlling drug resistance and improving patient survival. Thu, 21 Nov 2024 22:59:02 EST https://www.sciencedaily.com/releases/2024/11/241121225902.htm https://www.sciencedaily.com/releases/2024/11/241119181651.htm The Wistar Institute and the University of Buea in Cameroon has uncovered the mechanisms for a medicinal plant with anti-HIV potential in Croton oligandrus Pierre & Hutch, a species of African tree that has been used in traditional healing in Cameroon to treat a variety of diseases and conditions including cancers and diabetes. Tue, 19 Nov 2024 18:16:51 EST https://www.sciencedaily.com/releases/2024/11/241119181651.htm https://www.sciencedaily.com/releases/2024/11/241118125716.htm An international team of researchers has achieved an unprecedented milestone: the creation of mouse stem cells capable of generating a fully developed mouse using genetic tools from a unicellular organism, with which we share a common ancestor that predates animals. This breakthrough reshapes our understanding of the genetic origins of stem cells, offering a new perspective on the evolutionary ties between animals and their ancient single-celled relatives. Mon, 18 Nov 2024 12:57:16 EST https://www.sciencedaily.com/releases/2024/11/241118125716.htm https://www.sciencedaily.com/releases/2024/11/241116195642.htm To stem the surging antibiotic resistance public health crisis, scientists seek solutions inside the mechanics of bacterial infection. A new study has found a vulnerability related to magnesium availability. This limitation potentially could be exploited to stop the spread of antibiotic resistance. Sat, 16 Nov 2024 19:56:42 EST https://www.sciencedaily.com/releases/2024/11/241116195642.htm https://www.sciencedaily.com/releases/2024/11/241113192807.htm A new study uncovers vulnerabilities in drug-resistant TB, offering hope for improved treatments. Wed, 13 Nov 2024 19:28:07 EST https://www.sciencedaily.com/releases/2024/11/241113192807.htm https://www.sciencedaily.com/releases/2024/11/241104150515.htm Researchers used genomics to investigate the genetic changes causing resistance to transgenic crops in field populations of the corn earworm, also known as cotton bollworm or Helicoverpa zea. They discovered that in this voracious pest, field-evolved resistance was not associated with any of the 20 genes previously implicated in resistance to the pest-killing proteins in transgenic crops. Mon, 04 Nov 2024 15:05:15 EST https://www.sciencedaily.com/releases/2024/11/241104150515.htm https://www.sciencedaily.com/releases/2024/11/241101123641.htm A team led by researchers has discovered that a group of cells located in the skin and other areas of the body, called neural crest stem cells, are the source of reprogrammed neurons found by other researchers. Their findings refute the popular theory in cellular reprogramming that any developed cell can be induced to switch its identity to a completely unrelated cell type through the infusion of transcription factors. Fri, 01 Nov 2024 12:36:41 EDT https://www.sciencedaily.com/releases/2024/11/241101123641.htm https://www.sciencedaily.com/releases/2024/10/241031152032.htm Using a new method to isolate and reprogram plant cells into other cell types, biologists explored how banding patterns that increase the stability of plant cell walls are created and how their assembly can go astray in mutant plants. This work could ultimately inform methods to break down plant cells for biofuels. Thu, 31 Oct 2024 15:20:32 EDT https://www.sciencedaily.com/releases/2024/10/241031152032.htm https://www.sciencedaily.com/releases/2024/10/241030150215.htm Energy-making chloroplasts from algae have been inserted into hamster cells, enabling the cells to photosynthesize light, according to new research in Japan. It was previously thought that combining chloroplasts (chlorophyll containing structures in the cells of plants and algae) with animal cells was not possible, and that the chloroplasts would not survive or function. However, results showed that photosynthetic action continued for at least two days. This technique could be useful for artificial tissue engineering. Tissues can struggle to grow due to a lack of oxygen, but adding chloroplast-infused cells could enable oxygen and energy to be supplied through light exposure and photosynthesis. Wed, 30 Oct 2024 15:02:15 EDT https://www.sciencedaily.com/releases/2024/10/241030150215.htm https://www.sciencedaily.com/releases/2024/10/241024145236.htm New research shows that a large, ubiquitous mobile genetic element changes the antagonistic weaponry of Bacteroides fragilis, a common bacterium of the human gut. Thu, 24 Oct 2024 14:52:36 EDT https://www.sciencedaily.com/releases/2024/10/241024145236.htm https://www.sciencedaily.com/releases/2024/10/241016115915.htm Researchers have engineered bacteria as personalized cancer vaccines that activate the immune system to specifically seek out and destroy cancer cells. Wed, 16 Oct 2024 11:59:15 EDT https://www.sciencedaily.com/releases/2024/10/241016115915.htm https://www.sciencedaily.com/releases/2024/09/240930212900.htm A gene that limits cellular damage could be the key to surviving prolonged cold exposure. Mon, 30 Sep 2024 21:29:00 EDT https://www.sciencedaily.com/releases/2024/09/240930212900.htm https://www.sciencedaily.com/releases/2024/09/240917195402.htm Scientists have unravelled a mystery about the disappearance of dwarf hippos and elephants that once roamed the picturesque landscape on the Mediterranean island of Cyprus before palaeolithic humans arrived. Cyprus only had two species of megafauna present during the Late Pleistocene -- the 500-kg dwarf elephant (Palaeoloxodon cypriotes), and the 130-kg dwarf hippo (Phanourios minor), but both species disappeared soon after humans arrived around 14,000 years ago. Tue, 17 Sep 2024 19:54:02 EDT https://www.sciencedaily.com/releases/2024/09/240917195402.htm https://www.sciencedaily.com/releases/2024/09/240917125347.htm Recent research has revealed that a family of proteins called COI1, previously associated with defense mechanisms in other plant species like Arabidopsis and rice, primarily regulates growth in maize (corn). This finding could lead to developing more robust and productive maize varieties. Tue, 17 Sep 2024 12:53:47 EDT https://www.sciencedaily.com/releases/2024/09/240917125347.htm https://www.sciencedaily.com/releases/2024/09/240912161720.htm Researchers have shown unprecedented control of SIV replication and decay of viral reservoirs by combining a stringent model of infection with the interruption of antiretroviral therapy (ART). The success of this immune-based approach follows the research team's identification of the mechanisms of action for PD1 and IL-10, molecules known to regulate HIV persistence and immune dysfunction. Thu, 12 Sep 2024 16:17:20 EDT https://www.sciencedaily.com/releases/2024/09/240912161720.htm https://www.sciencedaily.com/releases/2024/09/240912135746.htm A professor of plant molecular biology wants people to know that plants have stem cells too. Just like in the medical world, plant stem cells could support human growth and development when used to improve the food supply. The researcher's lab discovered a transcription factor gene called HVA that controls cell division in vascular stem cells. Thu, 12 Sep 2024 13:57:46 EDT https://www.sciencedaily.com/releases/2024/09/240912135746.htm https://www.sciencedaily.com/releases/2024/09/240912135700.htm Plant scientists have identified a protein that plays a previously unknown role in controlling cell differentiation and determining gender in vascular plants, using a fern model. The discovery provides new insights into the stem cell-proliferation process that ensures the species reproduction and survival by preventing all offspring from developing as males. Thu, 12 Sep 2024 13:57:00 EDT https://www.sciencedaily.com/releases/2024/09/240912135700.htm https://www.sciencedaily.com/releases/2024/09/240911142050.htm Scientists zeroed in on brain circuitry powering the desire of spiny mice to live in large groups, opening the door to a new model for the study of complex social behaviors in mammals. Wed, 11 Sep 2024 14:20:50 EDT https://www.sciencedaily.com/releases/2024/09/240911142050.htm https://www.sciencedaily.com/releases/2024/09/240902111756.htm Researchers have made a world first breakthrough into creating blood stem cells that closely resemble those in the human body. And the discovery could soon lead to personalized treatments for children with leukemia and bone marrow failure disorders. Mon, 02 Sep 2024 11:17:56 EDT https://www.sciencedaily.com/releases/2024/09/240902111756.htm https://www.sciencedaily.com/releases/2024/08/240821124252.htm Researchers identified a signaling pathway in mice that boosts intestinal stem cells' regeneration abilities after fasting. When cancerous mutations occurred during this regenerative period, mice were more likely to develop early-stage intestinal tumors. Wed, 21 Aug 2024 12:42:52 EDT https://www.sciencedaily.com/releases/2024/08/240821124252.htm https://www.sciencedaily.com/releases/2024/08/240820221811.htm New method provides high-resolution surveillance data about multiple common antibiotic-resistant bacteria at once and could help prevent the spread of infections. Tue, 20 Aug 2024 22:18:11 EDT https://www.sciencedaily.com/releases/2024/08/240820221811.htm https://www.sciencedaily.com/releases/2024/08/240819130732.htm The sea anemone Nematostella vectensis is potentially immortal. Using molecular genetic methods, developmental biologists have now identified possible candidates for multipotent stem cells in the sea anemone for the first time. These stem cells are regulated by evolutionary highly conserved genes. Mon, 19 Aug 2024 13:07:32 EDT https://www.sciencedaily.com/releases/2024/08/240819130732.htm https://www.sciencedaily.com/releases/2024/08/240812123203.htm Researchers genetically modified poplar trees to produce high-performance, structural wood without the use of chemicals or energy intensive processing. Mon, 12 Aug 2024 12:32:03 EDT https://www.sciencedaily.com/releases/2024/08/240812123203.htm https://www.sciencedaily.com/releases/2024/07/240731170756.htm A nasal COVID-19 vaccine blocks transmission of the virus, according to an animal study. The findings suggest that vaccines delivered directly to the nose or mouth could play a critical role in containing the spread of respiratory infections. Wed, 31 Jul 2024 17:07:56 EDT https://www.sciencedaily.com/releases/2024/07/240731170756.htm https://www.sciencedaily.com/releases/2024/07/240730134823.htm Two of the closest known relatives to SARS-CoV-2 -- a pair of bat coronaviruses discovered by researchers in Laos -- may transmit poorly in people despite being genetically similar to the COVID-19-causing virus, a new study reveals. The findings provide clues as to why some viruses have greater 'pandemic potential' than others and how researchers might go about identifying those that do before they become widespread. Tue, 30 Jul 2024 13:48:23 EDT https://www.sciencedaily.com/releases/2024/07/240730134823.htm https://www.sciencedaily.com/releases/2024/07/240726193202.htm There's an experiment going on in conservation in Africa. With biodiversity imperiled, and nations facing financial and political crises, some governments are transferring the management of protected areas to private, non-governmental organizations (NGOs). Fri, 26 Jul 2024 19:32:02 EDT https://www.sciencedaily.com/releases/2024/07/240726193202.htm https://www.sciencedaily.com/releases/2024/06/240607151728.htm While smell plays a considerable role in the social interactions of humans -- for instance, signaling fear or generating closeness -- for ants, it is vitally important. Researchers have found that a key protein named Orco, essential for the function of olfactory cells, is also critical for the cells' survival in ants. Fri, 07 Jun 2024 15:17:28 EDT https://www.sciencedaily.com/releases/2024/06/240607151728.htm https://www.sciencedaily.com/releases/2024/05/240522225208.htm Populations of canola plants genetically engineered to be resistant to herbicides can survive outside of farms, but may be gradually losing their engineered genes, reports a new study. Wed, 22 May 2024 22:52:08 EDT https://www.sciencedaily.com/releases/2024/05/240522225208.htm https://www.sciencedaily.com/releases/2024/05/240509124740.htm An international collaboration says the world's largest marine protected areas aren't collectively delivering the biodiversity benefits they could be because of slow implementation of management strategies and a failure to restrict the most impactful human activities. Thu, 09 May 2024 12:47:40 EDT https://www.sciencedaily.com/releases/2024/05/240509124740.htm https://www.sciencedaily.com/releases/2024/04/240425131554.htm Mice lacking an olfactory system have had their sense of smell restored with neurons from rats, the first time scientists have successfully integrated the sensory apparatus of one species into another. Thu, 25 Apr 2024 13:15:54 EDT https://www.sciencedaily.com/releases/2024/04/240425131554.htm https://www.sciencedaily.com/releases/2024/04/240418132707.htm The annual influenza vaccine has become less effective on average over time. One reason may be reduced vaccine efficacy in people with obesity than those with a healthier body mass index (BMI), while the number of people with high BMI grows. Findings showed switching mice to a healthy diet four weeks before influenza vaccination protected 100% from a later flu exposure, despite still having a high BMI. Thu, 18 Apr 2024 13:27:07 EDT https://www.sciencedaily.com/releases/2024/04/240418132707.htm https://www.sciencedaily.com/releases/2024/04/240404113511.htm Many marine protected areas are falling short of their most basic purpose: to rebuild struggling fish populations. In a new study, scientists looked at the age breakdown of reef fish in marine protected areas for the first time. They discovered in almost all of them, adult fish populations -- vital to spawning the next generation -- have either flatlined or declined. Thu, 04 Apr 2024 11:35:11 EDT https://www.sciencedaily.com/releases/2024/04/240404113511.htm https://www.sciencedaily.com/releases/2024/03/240327124743.htm Australian rock-wallabies are 'little Napoleons' when it comes to compensating for small size, packing much more punch into their bite than larger relatives. Researchers made the discovery while investigating how two dwarf species of rock-wallaby are able to feed themselves on the same kinds of foods as their much larger cousins. Wed, 27 Mar 2024 12:47:43 EDT https://www.sciencedaily.com/releases/2024/03/240327124743.htm https://www.sciencedaily.com/releases/2024/03/240307165115.htm Retinoic acid, the active state of Vitamin A, appears to regulate how stem cells enter and exit a transient state central to their role in wound repair. Thu, 07 Mar 2024 16:51:15 EST https://www.sciencedaily.com/releases/2024/03/240307165115.htm https://www.sciencedaily.com/releases/2024/02/240226204650.htm The first stem cell culture method that produces a full model of the early stages of the human central nervous system has been developed by a team of engineers and biologists. Mon, 26 Feb 2024 20:46:50 EST https://www.sciencedaily.com/releases/2024/02/240226204650.htm https://www.sciencedaily.com/releases/2024/02/240226114551.htm Your liver plays a vital role in your metabolism, the biological process which converts food into energy. We know that being overweight can negatively affect metabolic activity, but not exactly how. To better understand this, researchers compared the livers of mice which were a typical weight with mice which were obese. They were surprised to find that biological regulation of metabolic activity, after a period of feasting and fasting, was reversed between them. In typical mice, allosteric regulation (the process which controls metabolism) was inhibited during feeding and activated when fasting. However, in obese mice, allosteric regulation increased during feeding and decreased when fasting. Mon, 26 Feb 2024 11:45:51 EST https://www.sciencedaily.com/releases/2024/02/240226114551.htm https://www.sciencedaily.com/releases/2024/02/240221160407.htm Researchers evaluated the prevalence, concentration and tissue distribution of essential and non-essential trace elements, including heavy metal toxicants in tissue (blubber, kidney, liver, skeletal muscle, skin) and fecal samples collected from 90 whales and dolphins stranded in Georgia and Florida from 2007 to 2021. Wed, 21 Feb 2024 16:04:07 EST https://www.sciencedaily.com/releases/2024/02/240221160407.htm