Russian bots dropped 45,000 garbage tweets on us during the Brexit referendum

Reports of Russian trolls meddling into the U.S. elections are quite widespread, and even subject to a recent congressional investigation. 
SEE ALSO: Russian ministry of defense tweets video game screenshot to accuse U.S. of cooperating with ISIS
Less well-known is Russia's interference in the UK's referendum on European Union membership in 2016. 
But now a paper — still incomplete — by data scientists at Swansea University and the University of California, Berkeley, is dig