The oldest fossilised dinosaur embryos found so far have been discovered by palaeontologists in China. With several of the embryos petrified at different stages of development, it offers a rare insight into exactly how dinosaurs developed inside eggs.
Also exciting is that the embryos appear to contain organic matter that hasn't been fossilised, which would be the oldest organic material ever found from a terrestrial vertebrate. The fossils -- which are thought to be either Massospondylus or Lufengosaurus-- have been dated as being between 190 and 197 million years old, the Lower Jurassic period.
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