From Twitter https://twitter.com/drsekula: RT @Fermilab: A speed trap for dark matter, revisited: http://www.symmetrymagazine.org/article/a-speed-trap-for-dark-matter-revisited via @SymmetryMag https://twitter.com/Fermilab/status/877307590065049602/photo/1 https://chirp.cooleysekula.net/attachment/35027