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Did interstellar debris fall to the sea floor? Claim meets sea of doubt
In 2014, a rock from space blazed through the atmosphere and exploded off the coast of Papua New Guinea with such ferociousness that some researchers believe the object came from beyond the Solar System. Now, a team of researchers says it has recovered remnants of the meteor from the floor of the Pacific Ocean and claims that a preliminary analysis of their unusual composition points to an origin around another star. Only in the past few years have astronomers realized that interstellar objects sometimes whizz through the Solar System and might even hit Earth. Finding a lump of rock from another planetary system would...
Source: Science of Aging Knowledge Environment - August 30, 2023 Category: Geriatrics Source Type: research

News at a glance: A win for obesity drugs, a new infectious disease institute head, and Mexican fireflies under threat
CONSERVATION Researchers raise alarm over threat to Mexican fireflies Scientists from the International Union for Conservation of Nature (IUCN) last week delivered a letter to the Mexican government requesting it regulate tourism centered on the threatened firefly species Photinus palaciosi . Endemic to Mexico’s Tlaxcala forests, P. palaciosi is one of the few species that glow in synchrony, offering an annual spectacle that attracts thousands of visitors during summer mating season. The letter describes how littering, artificial light, and noise interfere with the insects’ courtship and eg...
Source: Science of Aging Knowledge Environment - August 10, 2023 Category: Geriatrics Source Type: research

Clinical trial participant ’s autopsy and brain exam stoke Alzheimer’s drug fears
A full autopsy and detailed examination of the brain of a 79-year-old Florida woman who died after receiving lecanemab, an experimental Alzheimer’s therapy, in a pivotal clinical trial has deepened some researchers’ concerns that it poses serious risks for patients who share the woman’s hard-to-diagnose, preexisting condition. The patient’s history and autopsy “strongly suggests that lecanemab infusions were a catalyst leading to the events resulting in her death,” says Vanderbilt University pathologist Hannah Harmsen, co-author of a recently completed case report, which Science has obtained. The aut...
Source: Science of Aging Knowledge Environment - April 13, 2023 Category: Geriatrics Source Type: research

Your native tongue holds a special place in your brain, even if you speak 10 languages
This study “contributes to our understanding of how our brain learns new things,” says Augusto Buchweitz, a cognitive neuroscientist at the University of Connecticut, Storrs, who was not involved in the work. “The earlier you learn something, the more your brain [adapts] and probably uses less resources.” Scientists have largely ignored what’s going on inside the brains of polyglots—people who speak more than five languages—says Ev Fedorenko, a cognitive neuroscientist at the Massachusetts Institute of Technology who led the new study. “There’s oodles of work on individuals whose language systems are...
Source: Science of Aging Knowledge Environment - February 3, 2023 Category: Geriatrics Source Type: research

NIH ’s vaunted program for solving puzzling medical cases is running out of money
Ten years ago, an athletic 12-year-old from Affton, Missouri, named Mitchell Herndon began to experience muscle weakness that eventually led to him using a wheelchair. After years of visits to specialists failed to diagnose his neurological symptoms, he enrolled in a National Institutes of Health (NIH)-funded program that studies patients with debilitating mystery diseases. Researchers eventually found an explanation for Mitchell’s condition: a mutated gene that causes certain brain cells to produce an overactive protein that leads to neuron damage. Mitchell died 3 years ago at age 19. Since then, 14 more people hav...
Source: Science of Aging Knowledge Environment - June 27, 2022 Category: Geriatrics Source Type: research