Back In Those Times

Stanley was a physicist and was investigating time paradox and was eager to know if it's possible for an individual to travel through time. He sacrificed his whole life for years of labor making a time capsule. A time capsule which eventually worked and him being trapped in his 21 year old self and started to alter his life to be back with Anna, her girlfriend where he broked up with to pursue his dream of being a physicist. What could be altered in the past that could affect the future? "I wish I could bring back those times."