I would like to share one of my favorite videos from one of my favorite channels on YouTube. Sixty Symbols is a project from filmmaker Brady Haran and the professors at Nottingham University. They set out to make 60 videos explaining various physical and astronomical symbols. They already did it. And now they are doing 60 more.
thenewgreen: It must be frustrating for the scientists studying dark matter to know that it is likely occupying the same room they are, yet still they cannot detect it. I appreciated the videos approach to explanation and look forward to watching more.