The paper itself is paywalled but here is a phys.org article talking about it: https://phys.org/news/2017-09-scholars-big-ideas-harder.html https://phys.org/ne

The paper itself is paywalled but here is a phys.org article talking about it: https://phys.org/news/2017-09-scholars-big-ideas-harder.html https://phys.org/news/2017-09-scholars-big-ideas-harder.html