Some nice work that ties the timing of the radiation of three independent lineages of frogs, constituting the majority of modern living frogs, to about the time the major groups of dinosaurs took a hit (literally and figuratively!). Compelling and interesting story, with lots of intriguing follow-up questions. A more general article covering the findings is available here.
Yan-Jie Feng, David C. Blackburn, Dan Liang, David M. Hillis, David B. Wake, David C. Cannatella, and Peng Zhang. 2017. Phylogenomics reveals rapid, simultaneous diversification of three major clades of Gondwanan frogs at the Cretaceous–Paleogene boundary. PNAS 2017 ; published ahead of print July 3, 2017, doi:10.1073/pnas.1704632114