Published online December 12 in the journal Science, a new study offers the first evidence that a single bacterial species—the host of the phage—can maintain a diverse community of competing phage species. Knowing how more than one kind of virus can survive over time on a single bacterium could help in designing next-generation viral (phage) cocktails to treat bacterial infections.

For parents trying to shield their children from online threats, limiting screen time is a common tactic. Less time scrolling, the rationale goes, means less exposure to the psychological dangers posed by social media. 

But research from Rutgers University-New Brunswick upends this assumption. Writing in The Journal of Child Psychology and Psychiatry, Jessica L. Hamilton, an assistant professor in the Department of Psychology at the School of Arts and Sciences, reports that screen time has no effect on whether adolescents contemplated suicidal thoughts.

New research from Washington University in St. Louis shows that glioblastoma has an internal clock and syncs its daily rhythms to match — and take advantage of — the rhythms of its host. In this way, brain tumors grow in response to the host’s daily release of steroid hormones like cortisol.

A new analysis finds that the stress of being a caregiver is associated with an increased risk of developing hypertension in 21 to 44-year-old Black women.