It's published in nature, you can be sure it's pretty serious. That doesn't mean it 100% establishes a causal relationship. Generally science is more nuanced a

It's published in nature, you can be sure it's pretty serious. That doesn't mean it 100% establishes a causal relationship. Generally science is more nuanced and it's best not to negate its findings with the 'correlation is not causation' trope. That is something I guess everyone learns in their first year at university, you can assume peer reviewed scientific work is created by people who got the memo.