La NASA busca a la próxima generación de astronautas

A surprising discovery suggests that some early signs of Alzheimer’s disease may begin outside the brain. Using miniature laboratory systems made from human cells, scientists found that genetic mutations associated with inherited Alzheimer’s can disrupt nerve-to-muscle connections without any involvement from the brain or spinal cord. This could help explain why some patients experience changes in balance, walking, and coordination long before memory problems develop.

Scientists have uncovered a hidden gut-to-brain dopamine pathway that helps explain why bitter coffee and other initially unpleasant flavors can become favorites over time. The discovery reveals how the brain learns to crave certain foods and could eventually lead to new ways of reshaping eating habits and food preferences.

Written by Tasha Coelho, Mastcam-Z Student Collaborator at Arizona State University Nov. 1, 2026 Perseverance’s most recent abrasion “Pumbe” bears a striking resemblance to an earlier abrasion, “Badger Peak.” That’s no coincidence. As previously reported, that rock had a hardness too high to core. However, the team felt strongly that it was worth the effort […]

Using NASA’s Chandra X-ray Observatory, astronomers have discovered what is triggering repeated outbursts from a giant, unstable star. A new study, published Monday in the latest issue of The Astrophysical Journal, details the discovery of a previously hidden companion object that keeps pulling material away from the massive star every 113 days as they orbit […]