Itzhak Bars is a theoretical physicist at the University of Southern California in Los Angeles. In 2007, Bars presented the theory that time does not have only one dimension (past/future), but has two separate dimensions instead.
Humans normally perceive physical reality as four dimensional, i.e. three-dimensional space (up/down, back/forth and side-to-side), and one-dimensional time (past/future). Bars' theory proposes a six-dimensional universe, composed of four-dimensional complex space and two-dimensional time.
Physicist Joe Polchinski, at the Kavli Institute for Theoretical Physics at UC Santa Barbara, has said “Itzhak Bars has a long history of finding new mathematical symmetries that might be useful in physics... This two-time idea seems to have some interesting mathematical properties.” Quoted from Physorg.com article below.
- Article in Portal Ciência & Vida 26 October 2011 
- Article in Telegraph.co.uk 10 October 2007 
- Article in Physorg.com 15 May 2007 
- Link to New Scientist Magazine 13 October 2007 
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