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

The dangerous stuff in tobacco snuff

A study analyzing the chemical composition of smokeless tobacco—snuff and chewing tobacco—finds that, in excess of the risks posed by tobacco and nicotine exposure, users are subjecting their bodies to an array of harmful chemicals. Confirming and expanding on previous research into smokeless tobacco products, the researchers found

Magazine photos of sleeping babies may give new moms the wrong idea

In an analysis of 28 wide circulation women’s magazines, researchers found that more than one third of the images of sleeping babies show them lying down in a position that could increase their risk for Sudden Infant Death Syndrome (SIDS). The alarming number of photos reinforcing unsafe sleeping positions may be giving young mothers the

Nearly 90% of U.S. money has traces of cocaine

A study that tested paper money from 30 big cities in five countries—including the U.S., Brazil, Canada, China and Japan—found that big metropolitan areas in both Canada and the U.S. have an alarmingly high presence of cocaine on their currency, with traces of the narcotic on 85-90% of bills. Brazil, coming in just behind the North

Can smoking pot lower your threshold for pain?

A study published this week in Science suggests that the active ingredient in marijuana, cannabinoids—which include THC and other chemicals—may limit the body’s ability to tamp down pain responses, and, as a result, turn short term acute pain into more long term discomfort. While there has been a growing amount of research analyzing

Using mango seeds to kill bacteria

By processing mango pits instead of throwing them away, one University of Alberta researcher discovered a novel way to preserve food—and potentially combat dangerous bacterial infections such as Listeriosis. An outbreak of the illness last year in Canada left at least 21 people dead, making the findings published recently in the

The “language barriers” of facial expressions

Trying to communicate without a common language can be an exercise in bizarre and energetic gesturing, combined with exaggerated facial expressions. Yet, according to research published online in Current Biology, it’s not just our words, but even our smiles and frowns that can get lost in translation. A team of researchers led by Rachael

A case for using drug labels to curb health care costs

In an essay published in this week’s issue of the New England Journal of Medicine, a trio of medical researchers team up to propose a novel way to trim some of the nation’s ballooning health care costs: require FDA labeling to include information on how new drugs compare to existing remedies. Not exactly clear how that will save money?

The Science of One-Night Stands

In a confirmation of persistent stereotypes, an international team of psychologists have determined that when it comes to one-night stands, men have much lower standards than women do. The study, published in the journal Human Nature, revealed that when asked whether they would “go out with,” “go home with,” or “go to bed with,” a member …

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