Answer:
I have four legs but no tail. Usually I am heard only at night.
Covered in stone and sun. It's home to many but also none. What is it?
Being able to interpret the letters on this screen proves that you have this quality.
One by one we fall from heaven down into the depths of past, And our world is ever upturned so that yet some time we’ll last.
What can be swallowed, but can swallow you?
People take me on walks and I run and have fun. What am I?