Answer:
What can fill an entire room without taking up any space?
How do you discover something that does not exist?
A man goes upstairs to grab his time machine. He walks downstairs then goes back in time 200 years. Why did he go downstairs?
How do you blink twice without blinking twice?
What goes up and never comes down?
Sometimes I am white, sometimes I am dark. Most people love me. What am I?