Josh Bowman runs a Twitter account @TopologyFact with neat notes about topology. I think he was inspired by John Cook’s various @XFact accounts. (Here X is a variable. MATHEMATICS!) I want to remember this particular link, and I figure some of you might like it, too.
— Topology Fact (@TopologyFact) July 13, 2013
Edit: Patrick Honner was kind enough to point out that @JohnDCook runs @TopologyFact and Josh Bowman runs @GeometryFact. He also has offered to start @TwitterFactAccountFact.