Regarding darkness and light, from one of my favorite poets...
How It Came to Be
a bear who couldn't sleep through the winter
fished the full moon out of a lake
and hung it in her cave.
"There," she said, "in essence,
can there be another like me?"
Echo came back, "Incandescence."
"That's it, bulb," she cried,
"You turn me on!"
And she went right out and got lit.
Edison obtained wind of this
and stole the whole thing,
and that's why it isn't dark any more.