Using a digital, three-dimensional, articulated, free-swimming plesiosaur in a simulated fluid, researchers found that plesiosaurs were forelimb-dominated swimmers that used their hind limbs mainly for maneuverability and stability.Credit:Computer Simulations Imply Forelimb- Dominated Underwater Flight in PlesiosaursShiqiu Liu, Adam S. Smith, Yuting Gu, Jie Tan, C. Karen Liu, Greg TurkPLOS Computational Biology doi:10.1371/journal. pcbi.1004605