What am I?

I have no doors but I have keys, I have no rooms but I do have a space, you can enter but you can never leave. What am I?

I have keys, but can't open doors. What am I?

Physicists have built devices to move me very fast. My last seven letters can be commonly found in newspapers, magazines, and journals. What am I?

From house to house I go, sometimes narrow, sometimes wide. And whether there’s rain or snow I always stay outside. What am I?

Riddles and Answers