A study in which more than 43,000 children were evaluated for head trauma offers an unprecedented picture of how children most frequently suffer head injuries, report physicians at the School of Medicine and at the University of California, Davis.

Scientists often have ignored messenger RNA because they are quickly destroyed. But university biologists say damaged messenger RNA can jam the cellular machines that make protein. The failure to clear those jams and chew up the bad messengers is associated with neurodegenerative diseases such as Alzheimer’s.

Guest conductor André de Quadros will join the Washington University Choirs for “This Too Shall Pass,” a free concert at 3 p.m. Sunday, Nov. 23, at the 560 Music Center. The concert will feature both composed and improvised works, with a special emphasis on the musical practices of Muslim communities.

Students and other volunteers gathered last week to plant 31 native trees and shrubs adjacent to Busch Hall on the Danforth Campus. The Office of Sustainability notes that well-designed landscapes can provide economic, public health and environmental benefits.