I recently read an interesting article published in Physical Review Letters in October 2014 - "Identification of a Gravitational Arrow of Time." There were also other articles in several general interest science magazines. https://physics.aps.org/featured-article-pdf/10.1103/PhysRevLett.113.181101. It seemed like it could be a big deal, but I haven't read anything else about it with a date after 2014. What happened? Did it turn out to be incorrect or unimportant? Were there rebuttals? Was no one interested? I am curious to know what happened next.