I leave dark trails across a page, or keep young piglets neatly caged.

An animal I’ll help you find They won’t sneak up from behind In the field or in the pen I’ll sing for all to hear

I have a single eye, but I cannot see, Yet I show you things you never thought could be. I make the giants humble and the tiny grand, A curved glass servant waiting in your hand.

What's an astronaut’s favorite part of a computer?

Questionable pronunciation aside, I'm an object where love goes to die. Try to prolong the inevitable you may, but eventually my contents will wither away...