Brian Greene again takes us on a journey through time. He once again shows us the genius of Albert Einstein who explored what time really is. It starts with the whole business of the linear view that we have with beginnings and endings, the past and the future. He shows us how modern physicists see that time in the cosmic sense is a sort of bendable entity that is affected by the forces of space. We are also brought into the business of time travel which has been proven to work (although, we need to reach incredible speeds to make it practical). Over and over using atomic clocks, it has been shown that a body can move into the future, be it by micro-seconds. This is a fascinating series (though for the layman, it is quite intense).