Scientists resurrected 160-million-year-old proteins from extinct mammals; some were stronger against drug-resistant bacteria than modern human versions, raising new hopes for antibiotic research

A 7-mm stone in a 9-year-old's lower ureter moved back up to his kidney, then returned weeks after surgery, in what doctors call a first in a child.

Breakthrough sickle cell gene therapy: what made it work A report on the development of a gene therapy for sickle cell disease describes how multiple scientific advances converged to create a treatment that can correct the underlying defect in a way earlier a…