Modified gravity, demystified [video]

Here is the promised follow-up on my earlier video about dark matter. This time I explain how Modified Newtonian Dynamics gives rise to flat rotation curves and what’s the deal with the Tully-Fisher relation. Fixed my make-up issues but now I put the microphone in the wrong place, hence the noise from my shirt. Sorry about that. Click on “CC” in the bottom bar to get English captions.





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