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Your search has returned 240 articles:
  • Mystery Solved

    How salamanders can regrow nearly complete tails but lizards can’t

    Salamanders and lizards can both regrow their tails, but not to equal perfection.

    While a regenerated salamander tail closely mimics the original, bone and all, a lizard’s replacement is filled with cartilage and lacks nerve cells. That contrast is due to differences between stem cells in the animals’ spinal cords, researchers report online August 13 in Proceedings of the National...

    08/17/2018 - 12:30 Cells, Development, Animals, Evolution
  • News

    Tiny bits of RNA can trigger pain and itchiness

    Some snippets of RNA can be a real pain.

    A microRNA called miR-30c-5p contributes to nerve pain in rats and people, a new study finds. A different microRNA, miR-711, interacts with a well-known itch-inducing protein to cause itching, a second study concludes. Together, the research highlights the important role that the small pieces of genetic material can play in nerve cell function,...

    08/13/2018 - 14:06 Cells, Physiology, Neuroscience, Genetics
  • News in Brief

    Here’s how fast cell death can strike

    Scientists now know how long it takes for a cell to tell itself it’s time to die.

    Signals triggering a type of cell suicide called apoptosis move through a cell like a wave, traveling at a rate of 30 micrometers per minute, Stanford University systems biologists Xianrui Cheng and James Ferrell Jr. report in the Aug. 10 Science.

    These findings resolve a debate over whether these...

    08/09/2018 - 15:17 Cells, Development
  • News

    Nasty stomach viruses can travel in packs

    Conventional wisdom states that viruses work as lone soldiers. Scientists now report that some viruses also clump together in vesicles, or membrane-bound sacs, before an invasion. Compared with solo viruses, these viral “Trojan horses” caused more severe infections in mice, researchers report August 8 in Cell Host & Microbe.

    Cell biologist Nihal Altan-Bonnet had been involved in...

    08/08/2018 - 11:00 Cells, Immune Science, Microbiology
  • News

    Scientists successfully transplant lab-grown lungs into pigs

    For the first time, researchers have created lungs in the lab and successfully transplanted them into pigs.

    These bioengineered lungs, described online August 1 in Science Translational Medicine, developed healthy blood vessels that allowed pigs to live for several weeks after surgery. That’s a significant improvement from previous efforts: Lab-grown lungs implanted in rodents failed...

    08/03/2018 - 10:43 Biomedicine, Cells, Technology
  • News

    Newfound airway cells may breathe life into tackling cystic fibrosis

    Meet the ionocyte. This newly discovered cell may be the star of future cystic fibrosis therapies. Researchers have found that the gene tied to the disease is very active in the cells, which line the air passages of the lungs.

    While the cells are rare, making up only 1 to 2 percent of cells that line the airways, they seem to play an outsized role in keeping lungs clear. The...

    08/01/2018 - 17:06 Health, Cells
  • News

    How a slime mold near death packs bacteria to feed the next generation

    In the final frenzy of reproduction and death, social amoebas secrete proteins that help preserve a starter kit of food for its offspring.

    Dictyostelium discoideum, a type of slime mold in soil, eats bacteria. Some wild forms of this species essentially farm the microbes, passing them along in spore cases that give the next generation of amoebas the beginnings of a fine local patch of...

    07/27/2018 - 15:35 Microbes, Cells, Physiology
  • News

    Here’s why wounds heal faster in the mouth than in other skin

    Mouth wounds heal faster than injuries to other parts of the skin, and now scientists are learning how the mouth performs its speedy repairs.

    Some master regulators of gene activity work overtime in the mouth to heal wounds without scarring, researchers report July 25 in Science Translational Medicine. Those regulators — proteins known as SOX2, PITX1, PITX2 and PAX9 — are active in skin...

    07/25/2018 - 14:00 Genetics, Cells, Immune Science
  • News

    Researchers create hybrid embryos of endangered white rhinos

    The nearly extinct northern white rhino may not be completely lost.

    For the first time, white rhinoceros embryos have been made in the lab. Scientists injected preserved sperm from a male northern white rhino into eggs of female southern white rhinos, a closely related subspecies. The embryos were incubated until the cells began to differentiate, a stage at which they can be implanted...

    07/04/2018 - 14:50 Animals, Cells, Conservation
  • News

    This ‘junk’ gene may be important in embryo development

    A once-maligned genetic parasite may actually be essential for survival.

    Mouse embryos need that genetic freeloader — a type of jumping gene, or transposon, called LINE-1 — to continue developing past the two-cell stage, researchers report in the July 7 Cell.

    Many scientists “charge that these are nasty, selfish genetic elements” that jump around the genome, making mutations and...

    07/03/2018 - 07:00 Development, Cells, Genetics