Good article; discusses Newton, Einstein, Leibnitz. i'm with the latter:

http://www.newscientist.com/article/mg21128330.400-about-time-what-is-it.html?

Don't be afraid to sign up. Harmless, and allows about one story a week

Why does it go in one direction?

http://www.newscientist.com/article/mg21128330.500-about-time-why-does-times-arrow-fly-...

A cosmologist waxes philosophic about time. Adam Frank accepts multiverses, string theory and quantum gravity as next steps:

http://blogs.scientificamerican.com/guest-blog/2011/10/21/does-cosmology-matter/?WT_mc_...