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.
The Hindbrain. The hindbrain is thought to be the oldest part of the nervous system structure, and is made up of the cerebellum, the pons, and the medulla oblongata. The cerebellum is located underneath the cerebrum, and is primarily a center of movement control, regulation and coordination, and balance and posture.he Hindbrain. The hindbrain is thought to be the oldest part of the nervous system structure, and is made up of the cerebellum, the pons, and the medulla oblongata. The cerebellum is located underneath the cerebrum, and is primarily a center of movement control, regulation and coordination, and balance and posture.