World's oldest teeth discovered among fish fossils in China

Scientists in China say they have discovered fish fossils dating back 440 million years and that their findings could change the "understanding of the whole evolutionary framework".

"This is actually a very precious fossil evidence for us to better understand the origin and earliest evolution of jaws," says Min Zhu, a researcher from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) under the Chinese Academy of Sciences.