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THC may affect the way information is processed in the hippocampus. 
Years of using marijuana may harm this cognitive ability.
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Doesn't age itself do the same thing though?  They don't mention a control group, so I wonder if they were simply testing them against each other, or if there were proper methods used and non-smoking, same aged controls were tested and compared...
http://commons.pacificu.edu/spp/194/
EXCERPT
"..while performance on verbal intelligence measures remains relatively stable in older age, there is significant normal age-related memory decline. In fact, the magnitude of age-related decline in verbal memory performance is so substantial that there may be a significant difference between the memory performance of individuals in their early (i.e. 80 to 84) versus late (i.e. 85 to 89) eighties."
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It has to do with the caffeine. 
It's proven that the caffeine in coffee stimulates the brain, but there's something in a cup of joe that can also jump-start the other end of the body. That's right: Coffee can make you poop.
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Is it even possible? 
In a recent lecture, famed physicist Stephen Hawking has proposed using radiation emitted from mini black holes to power the Earth.
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Crazy
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Blame your genes! 
If no amount of coffee seems to help you feel fresh and alert in the morning, you may be able to blame your genes. A new study by the genetics company 23andMe has identified 15 regions of the human genome that are linked to being a morning person.
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The domestication likely happened 5,000 years ago. 
Wild leopard cats may have been domesticated by farmers in China more than 5,000 years ago, according to a new study of feline fossils.
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Where is your state on the list? 
Marijuana's popularity has fluctuated throughout history and across the globe. But in the United States, this drug is becoming ever more mainstream. Here are maps showing states with highest and lowest rates of pot smoking.
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% of people who have but won't admit it, 10%-15% 
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That could be a problem. 
An unfortunate death for an aroused male arachnid gives researchers a rare look at ancient harvestman genitalia.
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Find out some more info about this well preserved mummy. 
From his physical ailments and last meal to how exactly he died, scientists know quite a bit about this mummy.
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Yep, still looks like a shaman to me.
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Here's why it matters. 
Playtime could broaden kids' perspectives and ideas of what is "good" when it comes to body image, as new, diverse toys come onto the market, sociologists say.
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stop buying plastic garbage ¦ it pollutes both the mind and the environment ||
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The warning is for men who travel to countries where #Zika is spreading. 
U.S. health officials are warning men who travel to countries where Zika is spreading to take steps to prevent spreading the virus through sex if their partner is pregnant.
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Over the last century, species of vertebrates are dying out up to 114 times faster than they would have without human activity. 
Diverse animals across the globe are slipping away and dying as Earth enters its sixth mass extinction, a new study finds.
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Sad but true! Thank you for sharing this wonderful photograph of the Panda as well as I continue to learn from all those that respond on this subject. 
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They move over time like icebergs in the ocean. 
A newly released photo captured by NASA's New Horizons spacecraft during its historic Pluto flyby last July shows that the vast Sputnik Planum region within the dwarf planet's "heart" is studded with chains and clusters of water-ice hills.
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Science, Health and Technology News
Introduction
LiveScience, launched in 2004, is the trusted and provocative source for highly accessible science, health and technology news for people who are curious about their minds, bodies and the world around them. Our team of experienced science reporters, editors and video producers explore the latest discoveries, trends and myths, interviewing expert sources and offering up analyses of topics that affect peoples' lives in meaningful ways.