The simplest idea is that dark matter doesn't interact with itself at all. Could there be a kind of light that interacts with dark matter particles? And then you could get light, dark magnetic fields, maybe even dark atoms. If you like dark therapy neads, dark matter needs a little therapine to get in touch with itself. There's an obvious one that keeps everyone up at night: how to reconcile gravity and quanta mechanics.
How does physics impact our free will? Neil deGrasse Tyson and comic Negin Farsad discuss quantum mechanics, parallel universes, and the theory of everything with theoretical physicist and author of The Biggest Ideas in the Universe, Sean Carroll.
NOTE: StarTalk+ Patrons can watch or listen to this entire episode commercial-free.
Thanks to our Patrons aziz astrophysics, Scott Barnett, Christopher Saal, David Rhoades, and Jenna Biancavilla for supporting us this week.
Photo Credit: Геральт - geralt / 21281 images on Pixabay site, CC0, via Wikimedia Commons
Subscribe to SiriusXM Podcasts+ on Apple Podcasts to listen to new episodes ad-free and a whole week early.