Spooky “Dark Flow” Tracked Deeper Into the Cosmos; No Word on What’s Tugging at Galaxies | 80beats | Discover Magazine: “A year and a half ago, the team led by Alexander Kashlinsky of NASA proposed the controversial and ominously named ‘dark flow,’ a massive gravitational force that is tugging at galaxy clusters, and that Kashlinsky says could be coming from beyond the limits of our own visible universe. Now the team is back with a follow-up study in The Astrophysical Journal Letters, and Kashlinsky “