Answer:
There is an ancient invention. Still used in some parts of the world today. That allows people to see through walls.
I have many letters, And though it's strange to say, I stay the same no matter how many I give away.
What gets wetter and wetter the more it dries
Have you heard about the restaurant on the moon?
Today he is there to trip you up and he will torture you tomorrow.
I break away from my pack. I create holes in my victims. I can travel for miles and then disappear. I am part of a dying breed. What am I?