Researchers say the average length of a dream is two to three minutes. 

But many people experience their dreams as hours, if they can remember them at all. 

The science of dreaming has been questioned for hundreds of years. Some hypothesize that dreams are our way of processing real events that occur when we're awake. They may also serve as an outlet for repressed hopes and desires. 

Neuroscientists introduce a new theory every few years. 

But honestly, no one knows why we dream or why we have nightmares. We just hope that after the dream, we wake up. 

Some people spend their lives trying to make a dream come true. They set a goal, then make a plan on how to achieve it. It works for some people. 

But for others, it's not so easy. As hard as you work towards the dream, it can feel like the whole world is plotting against you. As you get further away from it, you cling to any sign of hope. 

And the longer it takes and the more it costs you, you start to consider whether you should give up.

 Do you find a new dream? 

Or do you stick to the one that started you on this journey in the first place?