Answer:
What invention lets you look right through a wall?
Why are there no living cats on Mars?
When is it bad luck to see a black cat?
Tuesday's Riddle: What gets wetter and wetter the more it dries?
What do Delhi, Mexico, Guinea, Castle, Jersey and Foundland have in common?
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?