Tiffany O'Callaghan

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

Articles from Contributor

The science of eye-catching gazes?

How quickly a straight woman can determine whether that guy across the bar is trying to catch her eye — or just trying to read the ESPN ticker on the TV above her head — may depend on how typically masculine his facial features are, according to new research published in the journal Psychological Science. And, the research from a

MMR, chicken pox: higher seizure risk with combo vaccine

New research published in the journal Pediatrics finds that giving children the measles, mumps and rubella (MMR) and chicken pox vaccines in two separate shots reduces the risk for febrile seizures, or fever-related convulsions that are not associated with conditions such as epilepsy. The analysis was based on data for 459,000 children

Wash your reusable shopping bags

A new study from researchers at the University of Arizona and Loma Linda University finds that reusable shopping bags can harbor potentially harmful bacteria if they aren’t cleaned — and 97% of people surveyed said they’d never washed theirs. Yet the study, funded by the American Chemistry Council, also found that washing the reusable

Report: fetus cannot feel pain before 24 weeks

A new report from the U.K.’s Royal College of Obstetricians and Gynaecologists (RCOG) concludes that, before 24 weeks, nerve endings in the brains of fetuses aren’t sufficiently developed to experience pain. The findings, based on a review of recent studies examining fetal development and capacity for pain, undermine the argument for a

A portable eye test — using a cell phone?

Researchers from the Massachusetts Institute of Technology’s Media Lab have come up with a way to test vision that doesn’t involve any hefty optometry equipment or even a visit to the eye doctor. A small, simple plastic device they’ve developed, when attached to the screen of a cell phone, can scan the eye and determine the appropriate

Using stem cells to restore sight

Using stem cell therapy, a team of Italian researchers was able to restore sight for patients who had been blinded or suffered severely impaired vision after suffering a chemical burn. In a study of 106 patients treated between 1998 and 2007, researchers were able to extract adult stem cells from healthy eye tissue, grow additional stem

Healthcare: U.S. spends more, but gets less

A new report from the Commonwealth Fund once again highlights the discrepancy between U.S. spending on healthcare and the quality of that care. The new analysis compares spending and health outcomes of seven industrialized nations: the U.S., U.K., Canada, Germany, the Netherlands, New Zealand and Australia. And the authors find that,

ER Doctors Feel Pressure to Overtest

Fear of lawsuits often prompts emergency room doctors to order tests that they may feel are unnecessary, the Associated Press reports. In the fast paced environment of an emergency department, making quick decisions that can have life-altering implications is a standard aspect of treatment — and the pressure not to miss anything is …

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