I missed this programme on Tuesday night so I'm watching it on the i-player. I know about dark matter and dark energy, but I've never heard about dark flow. I'm trying to learn something new about physics every day, so hopefully I'll know about dark flow by the end of the day.
http://www.bbc.co.uk/iplayer/episode/b00rgg31/Horizon_20092010_Is_Everything_We_Know_About_The_Universe_Wrong/
