DNA Mutation Time Bombs May Dictate When Animals Die
Animals carry “mutational clocks” in their cells that dictate how quickly their DNA picks up mutations. And across species, animals tend to die once they reach a certain number of mutations, according to new research.
It turns out that in long-lived mammals like humans, these mutational clocks run slower than in short-lived mammals like mice, which means that humans reach a threshold number of mutations at older than mice. This finding, the researchers say, could help solve a long-standing mystery in biology.
Does time exist? The answer to this question may seem obvious: Of course yes! Just look at a calendar or a clock. But developments in physics suggest that the non-existence of time is an open possibility, and one that we should take seriously. How is that possible, and what would that mean? It will take…
Sending humans virtually anywhere in space beyond the Moon pushes the logistics of health, food, and psychology to limits we are only beginning to grasp. A basic solution to these problems in science fiction is to simply put Void Travelers to bed for a while. In a state of sleep close to hibernation or torpor,…
The US Preventive Service Task Force has finalized its latest recommendations on low-dose aspirin regimens and now says people over the age of 60 should not start taking daily aspirin for the primary prevention of heart problems, in most of the cases. If you’re between the ages of 40 and 59, the USPSTF leaves it…
On Tuesday, the NCAA announced that Mark Emmert would step down as president, either once a replacement is found or by June 30, 2023. The remote departure date allows the Association to find a new leader and Emmert to continue to receive paychecks which, given his annual base salary of approximately $2.7 million, should be…
Not now, bird flu! China confirms first human case of H3N8 strain A four-year-old boy from Henan province is the first confirmed case of H3N8 The child had been in contact with chickens and crows raised at his home But no close contacts have been infected and officials say the risk to the public is…
Summary: The study reveals a two-way link between daytime napping and cognitive decline associated with Alzheimer’s disease. The researchers say that longer and more frequent naps were associated with worse cognition after one year, and that worse cognition was linked to longer and more frequent naps during the day. Source: Rush University Medical Center Could…
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