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Jellyfish
Jellyfish are marine invertebrates belonging to the Scyphozoa class, and in turn the phylum Cnidaria. The body of an adult jellyfish is composed of a bell-shaped, jellylike substance enclosing its internal structure, from which the creature's tentacles suspend. Each tentacle is covered with stinging cells (cnidocytes) that can stun or kill other animals: most jellyfish use them to secure prey or as a defense mechanism. Others, such as Rhizostomae, do not have tentacles at all.
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Health & Medicine News
August 20, 2026
Aug. 20, 2026 Knee osteoarthritis can seriously affect mobility and quality of life, but its progression isn’t completely out of your control. Exercise, stronger leg muscles, a healthier diet, and even modest weight loss can dramatically reduce stress on the ...
Aug. 20, 2026 Specialized brain scans reveal that schizophrenia is linked to widespread loss of the synapses that connect brain cells, with the left side of the brain hit especially hard. The damage follows a surprisingly organized pattern tied to the brain’s ...
Aug. 20, 2026 More than 1,000 genetic switches behave differently in male and female immune cells, helping explain why women are much more vulnerable to autoimmune diseases such as lupus. Female immune systems appear genetically tuned for stronger inflammatory ...
Aug. 19, 2026 Researchers have developed a new way to turn ordinary antibodies into tiny disease-fighting molecules that can work inside human cells, potentially opening new paths for treating Alzheimer’s, ...
Aug. 19, 2026 Scientists have found evidence that the effects of a mother’s age on her offspring may be driven by reversible changes in gene activity rather than permanent DNA damage. The discovery raises the fascinating possibility that biological information ...
Aug. 19, 2026 Coffee drinkers may be getting more than an energy boost. A Finnish study found that people who drank more coffee tended to have less total and abdominal fat, more muscle, and healthier metabolic ...
Aug. 19, 2026 Engineered probiotic bacteria were able to infiltrate pancreatic tumors, stimulate cancer-fighting immune cells, and slow tumor growth in animal studies. Even more strikingly, the treatment worked ...
Aug. 19, 2026 Breast cancer is rising rapidly among Asian American women, with some of the most alarming increases occurring in younger women and in aggressive or advanced cancers. Researchers say screening alone ...
Aug. 19, 2026 Silver nanoparticles can precisely slice DNA and create longer “sticky ends,” helping genetic fragments join up to five times more efficiently than conventional methods. The breakthrough could ...
Aug. 18, 2026 A widely prescribed blood pressure drug was associated with a 33% higher risk of serious kidney problems in people with type 2 diabetes, even when they were already taking kidney-protective ...
Aug. 18, 2026 Researchers have built microscopic, light-driven robots that can rapidly navigate through liquid, collect bacteria, and deposit them in chosen locations. These tiny “cleaners” could open new possibilities for manipulating cells and microbes with ...
Aug. 18, 2026 Kratom use and serious health problems linked to it have risen dramatically across the United States over the past decade. Poison center reports jumped from just 19 cases in 2010 to more than 1,200 in 2023, while severe outcomes—including ...
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Aug. 17, 2026 Scientists studying three artisan British cheeses found that the microbes responsible for their distinctive flavors may also offer surprising benefits for gut health. As the cheeses matured, helpful ...
Aug. 17, 2026 A low-fat vegan diet may help people lose weight without counting calories, shrinking portions, or feeling constantly hungry. In a 16-week clinical trial, people eating mostly fruits, vegetables, ...
Aug. 17, 2026 Researchers have uncovered a surprising way triple-negative breast cancer may turn the body against itself. Tumors appear to recruit macrophages—immune cells normally involved in healing and ...
Aug. 16, 2026 An experimental Alzheimer’s compound prevented damaging protein clumps from forming in the brains of mice, helping nerve cells survive longer and ...
Aug. 16, 2026 A centuries-old heart drug costing less than ten cents a day could help keep heart-failure patients out of the hospital. New research suggests low-dose digoxin can reduce heart-failure ...
Aug. 16, 2026 Exercise and healthy blood sugar levels in midlife may help slow cognitive decline decades later. Physical activity appeared especially beneficial for Mexican American adults, suggesting that some ...
Aug. 16, 2026 Aging gradually wears down the cartilage and fluid that protect our joints, but avoiding movement may actually make matters worse. Exercise helps nourish cartilage, strengthens the muscles that ...
Aug. 16, 2026 As we age, the body appears to sacrifice walking efficiency in exchange for stability. Older adults stiffen the ankle more with each step, which may help prevent falls but also forces the muscles to ...
Aug. 15, 2026 COVID-19 can reactivate dormant viruses hiding in the body, including Epstein-Barr, cytomegalovirus, and several herpes viruses. One poorly understood viral family was strongly associated with long ...
Aug. 15, 2026 Rising carbon dioxide in the atmosphere may be leaving a measurable imprint inside the human body. Researchers analyzing more than two decades of ...