Picture shows the 3D representation of different ancient ostracods. Chinese paleontologists along with their counterparts from Germany and Britain have discovered the oldest known animal sperm in the world in a piece of amber dating 100 million years ago, according to the Nanjing Institute of Geology and Palaeontology affiliated to the Chinese Academy of Sciences. (Nanjing Institute of Geology and Palaeontology affiliated to the Chinese Academy of Sciences/Handout via Xinhua)
