Good Riddles

Question: You walk down a path through the woods everyday. You always walk by one particular large rotting log which weighs over a ton. The next day you notice that there is another large log underneath the familiar one that you've never seen before. How did it get there?

Question: I have existed for centuries, but last only a month. What am I?

Question: A chicken gives meat and egg while cow gives us milk. Find another who gives us all these?

Question: I am made throughout the world, I am a masterpiece. And to your ears, I am but a humble feast. I am but a traveler, depicted through paper as a start, I can even be made through the work of your heart. What am I?

Question: A man travels by wagon,
brings joy each evening,
but depression by the morning.

Who is he?