Define scabies: contagious itch or mange especially with exudative crusts that is caused by parasitic mites (especially Sarcoptes scabiei) contagious itch or mange especially with exudative crusts that is caused by parasitic mites (especially Sarcoptes scabiei)â¦
Dirigibles, also called airships, fly by being lighter than air. This works because a dirigible is like a big hard balloon filled with lighter-than-air gas, such as helium or hydrogen. You've probably seen dirigibles used in advertising, like the Goodyear blimp. A famous dirigible accident was the Hindenburg crash.
In early dirigibles, the lifting gas used was hydrogen, due to its high lifting capacity and ready availability. Helium gas has almost the same lifting capacity and is not flammable, unlike hydrogen, but is rare and relatively expensive.