They produced thin shells of hydrate surrounding gas bubbles. (discovermagazine.com)
The astronomers hypothesize that energetic supernova explosions created fast - moving expanding bubbles of hot gas that collided with the surrounding cold gas of interstellar space, which in turn became compressed into thin shells. (members.nova.org)
DDT not only killed the falcons directly, it also affected their nesting behavior and caused female peregrines to lay eggs with very thin shells that broke during incubation. (educationworld.com)