"Of all the world's wonders, which is the most wonderful?"
"That no man, though he sees others dying all around him, believes that he himself will die."
-from the Mahabharata

"The yolk of a bird's egg is connected to the shell by albumen 'ropes.' During incubation, these ropes break and the mother bird must rotate her eggs to keep the yolks in the center while the chicks are forming." --- but how does the bird know to rotate the eggs? Yes, yes, biological imperative and what, but for me there's some interesting thoughts that could spiral off from that...