Faraday was a book binder. Einstein a patent clerk. Susskind background helped advance theory. Professionals have their problems. Citation gaming. It's possible

Faraday was a book binder. Einstein a patent clerk. Susskind background helped advance theory. Professionals have their problems. Citation gaming. It's possible to get a degree relying on a jargon and learning by wrote without a true comprehension. It makes you not just rely on particle or gravity field. People starting from scratch have to really explain themselves. Dark matter, you have gravity forces with far less visible mass. If you want a dark matter particle, it has to absorb from the surroundings without changing its surroundings, while not radiating light. Gravity, heat transfer through the changing of relative clocks works well enough.