>World's northernmost island
Scientists have discovered what is believed to be the world's northernmost landmass - a yet-to-be-named island north of Greenland that could soon be swallowed up by seawaters.
Researchers came upon the landmass on an expedition in July, and initially thought they had reached Oodaaq, up until now the northernmost island on the planet.
"We were informed that there had been an error on my GPS, which had led us to believe that we were standing on Oodaaq Island," said the head of the mission, Morten Rasch from Copenhagen University's department of geosciences and natural resource management.
Oodaaq is some 700 kilometers south of the North Pole, while the new island is 780 meters north of Oodaaq. But it is only 30 to 60 meters above sea level, and Rasch said it could be a "short-lived islet".
>Task force to remove gum waste
Chewing gum producers have signed up to a ￡10 million task force to remove the sticky scourge from our high streets. The cash pledge by Mars Wrigley, GlaxoSmithKline and Italian-Dutch multinational company Perfetti Van Melle will help tackle the gum litter that costs ￡7 million a year to remove from pavements.
Working with Keep Britain Tidy, the firms will invest the money over the next five years to encourage people to bin it instead.
Around 87% of England's streets are stained by chewing gum waste, according to Keep Britain Tidy.
Pilot tests have shown that gum litter can be reduced by up to 64% when people are asked to change their behavior.
Littering is a criminal offence, and offenders face on-the-spot penalties of ￡150, rising to up to ￡2,500 if convicted in court.
>Sedentary time increases stroke risk
Adults under 60 who spend most of their days sitting have a higher risk of stroke compared to those who spend more time being physically active, a new study finds. People who reported sitting eight or more hours daily and were not very physically active otherwise were seven times more at risk of having a stroke than people who spent fewer than four hours being sedentary and at least 10 minutes exercising each day, according to a study published in Stroke from the American Heart Association.
Researchers included the health information of 143,000 adults from the Canadian Community Health Survey in their analysis. The scientists followed the participants, who were 40 years and older with no prior history of stroke, for an average of 9.4 years.
"Sedentary time is thought to impair glucose, lipid metabolism and blood flow, and increase inflammation in the body," said lead study author Dr. Raed Joundi, clinical scholar at McMaster University in Ontario, Canada. "These changes, over time, may have adverse effects on the blood vessels and increase the risk of heart attack and stroke."
>Sleeping problem elevates risk for dementia
Older adults who sleep six hours or fewer a night may have elevated risk for dementia and other cognitive issues, a new study finds.
Researchers at Stanford University measured the dementia risk and cognitive abilities of seniors ages 65 to 85, finding higher risk in patients who regularly slept six or fewer hours compared to those who slept seven or eight hours.
Seniors who slept nine or more hours also had lower cognitive functions and other health issues, but the researchers didn't find the same high dementia risk in this group.
This disruption may be linked to Alzheimer's and other forms of dementia, impacting seniors' ability to remember information, problem-solve, and go through everyday tasks.
Sleep disruption can also be caused by - or heighten - depression, cardiovascular disease, and other conditions.
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