Tiffany O'Callaghan

Tiffany O'Callaghan has been a contributing health and science reporter for TIME and TIME.com since August 2007. She is based in Seattle.

Articles from Contributor

Can background music up the odds of getting a date?

According to a new study from French researchers, when romantic music is playing in the background, women may be more likely to agree to a date. To determine whether romantic music might actually help spark a romance, researchers from Université de Paris-Sud and Université de Bretagne-Sud recruited 87 women 18- to 20-year-old single

ER visits surge for abuse of legal drugs

In 2008, roughly one million people wound up in the emergency room for abuse of prescription and over-the-counter drugs — just as many as visited the ER after using illegal substances, according to new data released yesterday by the Substance Abuse and Mental Health Services Administration (SAMHSA) and the Centers for Disease Control

10 Risk Factors Linked to 90% of Strokes

Analyzing data on 6,000 people — half of whom suffered a stroke, and half of had not — from 22 countries around the globe, researchers from Canada’s McMaster University identified 10 common risk factors, including smoking, high blood pressure and belly fat, associated with 9 out of 10 strokes. The results of the INTERSTROKE study, as

HIV research: breastfeeding, kidney transplants

New research published in the July 17 issue of the New England Journal of Medicine suggests promising developments in the battle against HIV and AIDS. In a study of more than 2,300 breastfeeding HIV-positive mothers, researchers from the University of North Carolina and the Centers for Disease Control and Prevention found that

The brain science behind why we care what others think

A team of researchers from University College London and Aarhus University in Denmark may have uncovered some clues to help explain why we care what other people think — and why some people care more than others. The research, published in the journal Current Biology, suggests that the area of our brains associated with reward is more

Obesity’s impact on sexual health

Though they tend to have sex less frequently than their slimmer peers, obese women may be four times more likely to have an unwanted pregnancy, according to findings published in BMJ this week. In a study of more than 12,000 French men and women between the ages of 18 to 69, researchers found that obese women were less likely than

Why do women get more stressed out than men?

Initial results from an animal study conducted by researchers at the Children’s Hospital of Philadelphia may shed some light on a question that has perplexed both sexes: why do women often seem to get so much more stressed out than men? In a rat study led by neuroscientist Dr. Rita Valentino, researchers found that females were more

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