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Study finds no long-term negative cognitive effects from marijuana

While cognitive performance is negatively affected by cannabis use, the negative effects appear to completely wear off within a month, according to research published in the Experimental and Clinical Psychopharmacology in late June. “With the number of cannabis users both illicitly and licitly increasing, the question of any potential lasting…

Hubble telescope spots fifth moon near Pluto

WASHINGTON — US astronomers have found a fifth moon orbiting far-away Pluto, NASA said on Wednesday. The irregular-shaped moon, nicknamed S/2012 for now, is about six to 15 miles (10 to 24 kilometers) across, the US space agency said. Last year, astronomers reported finding the fourth moon around the icy…

Link between depression and Facebook probably unfounded, says study

Worries about a link between depression and the amount of time spent on Facebook or other social media sites are probably unfounded, a US study said this week. The University of Wisconsin School study found no basis to support the theory outlined in a study last year by the American…

Quitting smoking adds more pounds than thought: study

Quitting smoking leads to an average weight gain of four to five kilogrammes (nine to 11 pounds) in the first year — “significantly” more than previously thought, a study said Wednesday. Most of the pounds are piled on in the first three months, a team of medical researchers wrote in…

Scientists to directly link extreme weather to man-made climate change

Climate change researchers have been able to attribute recent examples of extreme weather to the effects of human activity on the planet’s climate systems for the first time, marking a major step forward in climate research. The findings make it much more likely that we will soon – within the…

Scientific animal testing at 25 year high in the UK

The number of scientific procedures carried out on animals last year was the highest in Britain for almost 25 years, according to figures released by the Home Office. More than 3.79m procedures, which range from breeding GM mice to mimicking neurological diseases in animals, were carried out, marking a rise…

Contraception saves 250,000 lives each year: study

Contraceptive use saves the lives of more than a quarter of million women each year, either from death in childbirth or unsafe abortions, according to estimates published on Tuesday. In 2008, 355,000 women died while giving birth or from illegal or dangerous abortions, a study published by The Lancet said.…

Brazil to breed GM mosquitoes to combat dengue

Brazil said it will breed huge numbers of genetically modified mosquitoes to help stop the spread of dengue fever, an illness that has already struck nearly 500,000 people this year nationwide. Dengue affects between 50 and 100 million people in the tropics and subtropics each year, causing fever, muscle and…

Sitting less may extend American lives: study

PARIS — American adults may boost their life expectancy by two years by sitting for fewer than three hours a day, researchers said Tuesday, while admitting this was a tough task. Reducing television viewing to under two hours a day could similarly add 1.4 years, the US team said in…

Marijuana-based drug could help treat obesity: report

British drugmaker GW Pharmaceuticals is testing a marijuana-based drug it believes may be useful in treating obesity by suppressing the appetite, according to a published report. While marijuana is typically known for its appetite-boosting effects, Dr. Stephen Wright, director of GW Pharma’s research and development department, told The Telegraph recently that two specific…

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