04:53Dark matter. Or what?
From the creator
In this video I explain just what physicists mean when they speak about "dark matter" and what reasons we have to think that dark matter exists. In my two follow-up videos, I speak about the alternative explanation, modified gravity, and explain why the right solution might well be a combination of both ideas. You can support my videos by donating here: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=QZ6QCBQYUMJEG&source=url
Published 2018-10-31 · Watch on YouTube ↗
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