https://www.nature.com/articles/s41550-018-0573-2  Published: 24 September 2018 No evidence for modifications of gravity from galaxy motions on cosmological scales: Abstract: Current tests of general relativity (GR) remain confined to the scale of stellar systems or the strong gravity regime. A departure from GR on cosmological scales has been advocated1 as an alternative to the cosmological constant Λ (ref. 2) to account for the observed cosmic expansion history3,4. However,