Three different moments in a far-off supernova explosion were captured in a single snapshot by the NASA/ESA Hubble Space Telescope. The progenitor star exploded more than 11 billion years ago, when the Universe was less than a fifth of its current age of 13.8 billion years. París, November 09, 2022.-Continuar Leyendo
A new model that accounts for the interplay of forces acting on newborn planets can explain two puzzling observations that have cropped up repeatedly among the more than 3,800 planetary systems cataloged to date. Houston, November 07, 2022.- One puzzle known as the «radius valley» refers to the rarity ofContinuar Leyendo
Visual signals, such as color patterns are an important communication medium for anemonefish. Researchers from Okinawa Institute of Science and Technology have recently elucidated how the patterns on anemonefish—which are conspicuous white bars against an orange, red, or black background—influence their aggressive behavior and possibly determine the color patterns ofContinuar Leyendo
As heart cells mature in mice, the number of communication pathways called nuclear pores dramatically decreases, according to new research from University of Pittsburgh and UPMC scientists. While this might protect the organ from damaging signals, it could also prevent adult heart cells from regenerating, the researchers found. Pittsburgh, NovemberContinuar Leyendo
A drug called semaglutide, which is approved for adults with obesity or overweight, also helps adolescents shed pounds and have healthier hearts, according to a new study published today in the New England Journal of Medicine and presented at Obesity Week 2022. Pittsburgh, November 04, 2022.- In an international phaseContinuar Leyendo
There are several theories about how the Earth and the Moon were formed, most involving a giant impact. They vary from a model where the impacting object strikes the newly formed Earth a glancing blow and then escapes, through to one where the collision is so energetic that both theContinuar Leyendo
By Jim Schnabel Weill Cornell Medicine Ithaca, November 3, 2022.- Innate lymphoid cells are a recently discovered family of white blood cells that reside in the skin, gastrointestinal tract, airways and other barrier tissues of the body. Group 2 innate lymphoid cells (ILC2s) have an essential role in protecting theseContinuar Leyendo
A spooky spider web, magical dragons or wispy trails of ghosts? What do you see in this image of the Vela supernova remnant? This beautiful tapestry of colours shows the ghostly remains of a gigantic star, and was captured here in incredible detail with the VLT Survey Telescope, hosted atContinuar Leyendo
An unprecedented study of brain plasticity and visual perception found that people who, as children, had undergone surgery removing half of their brain correctly recognized differences between pairs of words or faces more than 80% of the time. Considering the volume of removed brain tissue, the surprising accuracy highlights theContinuar Leyendo
Viral DNA in human genomes, embedded there from ancient infections, serve as antivirals that protect human cells against certain present-day viruses, according to new research. Ithaca, NY, October 31, 2022.- The paper, «Evolution and Antiviral Activity of a Human Protein of Retroviral Origin,» published Oct. 28 in Science, provides proofContinuar Leyendo
