Explanations for time's arrow keep marching on

By Tom Siegfried, 14:08 PM March 21, 2013

Time after time, physicists have tried to explain time. Many claim to have succeeded. But they haven’t. Otherwise everybody would quit trying to explain it all over again.

One of the most recent such efforts comes from the mathematician/cosmologist George F.R. Ellis. He thinks solving the time mystery involves figuring out the difference between the past and the future.

That’s not as obvious as it sounds. Physical laws governing motion make no distinction between future and past. Equations...

Source URL: https://www.sciencenews.org/article/explanations-times-arrow-keep-marching