Dark matter faces its biggest challenge of all
Ethan Siegel

Yet another challenge from high-redshift young galaxies, where it seems little if any need for dark matter to describe their symmetrically falling rotation curves.

(my short review in Russian, which may be of some interest to you in general; link to original paper also shown, whereas Nature article of Mar 15 sits behind the fricking paywall, so I’ll not include link to it).