PHILADELPHIA (Feb. 20, 2018) - Studies have shown that talking with teens about sex-related topics is a positive parenting practice that facilitates important sexual health outcomes with heterosexual adolescents. But for LGBTQ youth, the topic of sexuality and sexual health is often ineffectively addressed at home.

OAK BROOK, Ill. - An MRI breast imaging technique that requires no contrast agent, combined with sophisticated data analysis, could reduce the number of unnecessary breast biopsies, according to a new study appearing online in the journal Radiology.

Breast MRI currently is used to screen women at high risk of breast cancer and as a diagnostic adjunct to mammography. The examination relies on gadolinium-based contrast agents that need to be injected intravenously.

Philadelphia, Feb. 20, 2018 - Blacks have a higher incidence of stroke and stroke-associated disability than whites. However, few studies have evaluated racial differences in stroke before a diagnosis of atrial fibrillation (AF). A new report published in HeartRhythm examined stroke risk in the short term prior to a diagnosis of AF.

BINGHAMTON, NY - An increase in social conflict increases the likelihood of assassinations of political leaders, according to new research co-conducted by faculty at Binghamton University, State University of New York.

Although socio-economic status is known to influence health, strong evidence of the association between economic vulnerability in childhood and the health of older adults was still missing. As part of the "National centre of Competence in Research - NCCR LIVES" funded by the Swiss National Science Foundation, researchers at the University of Geneva (UNIGE) examined data from more than 24,000 people aged 50 to 96 living in 14 European countries.

A new online game puts players in the shoes of an aspiring propagandist to give the public a taste of the techniques and motivations behind the spread of disinformation - potentially "inoculating" them against the influence of so-called fake news in the process.

Punishing a wrongdoer may be more rewarding to the brain than supporting a victim. That is one suggestion of new research published in JNeurosci, which measured the brain activity of young men while they played a "justice game."

A new login authentication approach could improve the security of current biometric techniques that rely on video or images of users' faces. Known as Real-Time Captcha, the technique uses a unique "challenge" that's easy for humans -- but difficult for attackers who may be using machine learning and image generation software to spoof legitimate users.

BOSTON -- (Feb. 19, 2018) -- Every cell in your body responds to the hormone insulin, and if that process starts to fail, you get diabetes. In an unexpected finding, scientists at Joslin Diabetes Center have identified four viruses that can produce insulin-like hormones that are active on human cells. The discovery brings new possibilities for revealing biological mechanisms that may cause diabetes or cancer.

For the first four billion years of Earth's history, our planet's continents would have been devoid of all life except microbes.

All of this changed with the origin of land plants from their pond scum relatives, greening the continents and creating habitats that animals would later invade.

The timing of this episode has previously relied on the oldest fossil plants which are about 420 million years old.