Cabins and carpet (**)

Some riddles. If you can answer one then you know what you need to do to answer the others.

• Two people are found dead in a cabin in the woods. How did they die?
• Anthony and Cleopatra are dead. There is a broken bowl nearby. How did they die?
• Every day the man saw his dog ran into the woods. However, he noticed that the dog never ran more than halfway into the woods. Why?
• It is at the end of time, the start of eternity, and at the very core of forever. What is it?