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 Next-Gen Goodyear Blimp debuted in 2014. Called Wingfoot One, the new blimp is technically not a blimp. Goodyear has moved to a new design called a semi-rigid. A semi-rigid airship has a keel (or truss) supporting the length of the main envelope. The shape is still supported by the gas, but you can think of it as putting a backbone into the blimp.