Scientists have uncovered a new species of raptor in Argentina that sports the same telltale curved claw as the velociraptors found in China, some 19,000km (11,800 miles) away. Though they were found on opposite ends of the world, these two dinosaurs were close kin – tracing back to a common ancestor from an era when the continents were knitted together to form one big land mass. This discovery, published late last month in the Journal of Vertebrate Paleontology, has prompted scientists to...