Marijuana may improve women’s enjoyment of sex

About one-third of U.S. women have used marijuana before sex, a small study suggests, and those who do report increased desire and better orgasms. A woman holds a joint on the day Canada became the first industrialized nation to legalize recreational marijuana at Trinity Bellwoods Park, in Toronto, Ontario, Canada, October 17, 2018. REUTERS/Carlos Osorio … Read more

Melatonin’s heart protective effects not related to its antioxidant properties: Antiarrhythmic benefit from melatonin is distinct from its antioxidant effect

Although melatonin does improve the outcomes of induced heart attacks in rats, those improvements are not the result of its antioxidant effect, new research finds. The study comparing antioxidant activity and heart protection will be presented today at the American Physiological Society (APS) annual meeting at Experimental Biology 2019 in Orlando, Fla.. Antiarrhythmic agents are … Read more

Progress toward Epstein-Barr virus vaccine

This is a cryo-EM image of the gH/gL/gp45 candidate vaccine construct. Credit: NIAID A research team led by scientists from NIH’s National Institute of Allergy and Infectious Diseases (NIAID) has determined how several antibodies induced by Epstein-Barr virus (EBV), a herpesvirus that causes infectious mononucleosis and is associated with certain cancers, block infection of cells … Read more

Scott Kelly’s Year in Space May Have Aged Him — But He’s Mostly Fine

Brothers Scott (left) and Mark Kelly are the only identical twin astronauts in history. Credit: Courtesy NASA Twins Study In a famous Einsteinian thought experiment called the twin paradox, a twin who embarked on a whirling flight through space would age more slowly compared to the twin left back home on Earth, a result of … Read more

Why Do Humans Have Wisdom Teeth That Need to Be Removed?

(Credit: Dooder/Shutterstock) Wisdom teeth seem like a biological mishap. Our third and final set of molars to grow, wisdom teeth don’t quite fit in many people’s mouths, leading to millions of surgeries per year. But in some people, these “extra” teeth come in just fine, while others don’t have them at all. What’s the biological … Read more

Event commemorating 1969 Harvard strike to include current student activists

Striking lessons from the 1960s Courtesy of Harvard University Archives Event to commemorate student protest that rocked the campus, connect to today’s student-activists Miles Rapoport ’71 boasts an impressive resumé. He spent 15 years as a community organizer and another 15 as a state legislator and the secretary of state in Connecticut. In 2017, he … Read more

Ketamine reverses neural changes underlying depression-related behaviors in mice

3-D model of Ketamine. Credit: Wikipedia Researchers have identified ketamine-induced brain-related changes that are responsible for maintaining the remission of behaviors related to depression in mice—findings that may help researchers develop interventions that promote lasting remission of depression in humans. The study, funded by the National Institute of Mental Health (NIMH), part of the National … Read more

Researchers uncover how innocuous gut bacteria mutated to become deadly blood infectors

A microscope image of wild-type (left) and mutant (right) Enterococcus faecalis bacteria. Credit: D. Van Tyne et al., Science Translational Medicine (2019) A team of researchers from several institutions in the U.S. has unveiled the evolutionary process that transformed a common type of human gut bacteria into a deadly infectious agent. In their paper published … Read more

Chinese researchers add human brain-related gene to monkey genome in controversial experiment

Credit: CC0 Public Domain A team of researchers working in China has created several transgenic rhesus monkeys by adding a human gene involved in brain growth to the monkey’s genome. In their paper published in the National Science Review, the group describes their work and the testing they conducted on the monkeys after they were … Read more

Biochemical switches could be triggered to treat pathology of IBM, ALS and FTD

St. Jude Children's Research Hospital scientists have found that the enzymes ULK1 and ULK2 play a key role in breaking down cell structures called stress granules, whose persistence leads to toxic buildup of proteins that kill muscle and brain cells. Such buildup is central to the pathology of three related diseases: inclusion body myopathy (IBM), … Read more

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