The full lists of Top physics 50 articles in Nature Communications can be found here: the article was regarded as highly valuable by the research community itself by being among the upper 25 most read articles in physics. The journal published more than 5,500 papers in 2019, so the article's position is a great achievement.
In this work, a team of researchers from the University of Vienna, the Austrian Academy of Sciences as well as the University of Queensland (AUS) and the Stevens Institute of Technology (USA) have combined the key elements of the theories of quantum mechanics and gravity to discover that temporal order between events can exhibit genuine quantum features. Combining the theories of quantum mechanics and gravity is one of the main modern challenges of physics.
For more on the publication see: https://www.iqoqi-vienna.at/detail/news/quantum-gravitys-tangled-time/