A rare, small RNA turns a gene-splicing machine into a switch that controls the expression of hundreds of human genes.
Differences in the utilization of intensive care services may be one potential explanation for improved outcomes after major surgery in the U.S.
Cancer metastasis requires tumor cells to acquire properties that allow them to escape from the primary tumor site, travel to a distant place in the body, and form secondary tumors.
Daniel Janzen and Winnie Hallwachs of the School of Arts and Sciences are highlighted for their insect research and collecting in Costa Rica.
When it comes to sleep, Penn Medicine researchers are finding out that some things really are black and white.
Both basic scientists and clinicians have an interest in how the cells of our body move. Cells must be mobile in order for organisms to grow, to heal, to transmit information internally, to mount immune responses and to conduct a host of other activities necessary for survival.
A new analysis of dinosaur fossils by University of Pennsylvania researchers has revealed that a number of specimens of the genus Psittacosaurus — once believed to represent three different species — are all members of a single species.