Shell
Bird eggshells are diverse. For example:
- cormorant eggs are rough and chalky
- tinamou eggs are shiny
- duck eggs are oily and waterproof
- cassowary eggs are heavily pitted
Tiny pores in a bird eggshell allow the embryo to breathe. The domestic hen's egg has around 7500 pores.
Read more about this topic: Bird Egg
Famous quotes containing the word shell:
“Billy: You dropped some shell in there.
Ted: It’s all right. Makes it crunchier that way. You like French toast crunchy, don’t you?”
—Robert Benton (b. 1932)
“We want some coat woven of elastic steel, stout as the first, and limber as the second. We want a ship in these billows we inhabit. An angular, dogmatic house would be rent to chips and splinters, in this storm of many elements. No, it must be tight, and fit to the form of man, to live at all; as a shell is the architecture of a house founded on the sea.”
—Ralph Waldo Emerson (1803–1882)
“How then can we account for the persistence of the myth that inside the empty nest lives a shattered and depressed shell of a woman—a woman in constant pain because her children no longer live under her roof? Is it possible that a notion so pervasive is, in fact, just a myth?”
—Lillian Breslow Rubin (20th century)