Today I tell you how my opinion about dark matter has changed an why. Is modified gravity better or worse? What evidence speaks for one side or the other, and is the case really as clear-cut as many astrophysicists claim?

#physics​ #space​ #astronomy​

0:00​ Intro
0:23​ What is dark matter?
2:22​ Evidence for dark matter
5:11​ Evidence against dark matter
7:25​ If not dark matter, then what?
9:43​ Why we haven’t made progress
10:37​ Sponsor message