1 Hydrogen is the most abundant element in the universe. 2  Hydrogen isn't common in a pure form on Earth, but is mostly found as part of water. 3  Hydrogen is the main fuel of stars and the only fuel for red dwarfs. 4  The whole universe is thought to have been formed by a Hydrogen nucleus.
Noun. 1. hindlimb-a posterior appendage such as a leg or the homologous structure in other animals. hind limb. hind leg-the back limb of a quadruped. limb-one of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper. 1  Facebook.
Had a short, S-shaped neck and a long, whiplike tail (over half the length of its body) Had long forelimbs, about 2/3 the length of its hind legs To learn more about dinosaurs and I Know Dino, connect with us on the following sites: Facebook: https://www.facebook.com/iknowdino Twitter: https://twitter.com/iknowdino Tumblr: http://iknowdino.tumblr.com/