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I've been reading a lot trough different articles about dark-matter and dark-energy and how they could explain observations such as the acceleration of the expansion of the universe or the gravitational pull of galaxies.

But what I ask myself is why? Why were these objects introduced in the first place? Why did physicists jump to conclusion saying this was another kind of unknown matter (which seems to me as a giant leap), and what are the reasons that made them follow this lead? Couldn't we consider that matter "simply" has exotic properties at large scales, just like it has at microscopic scales, which seems more fitting to me.

Are their any leads or theories that try to explain these phenomena without introducing the concept of dark-matter/energy?

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  • $\begingroup$ Well you have a couple of options. People tend to use occam’s razor to check which theory would be the best. $\endgroup$
    – physics2000
    Commented Mar 24, 2018 at 12:46
  • $\begingroup$ Here’s another view. We know that the matter has to have positive mass to exert G forces. It also should not interact with light hence its invisible. Hence scientists call it dark matter. $\endgroup$
    – physics2000
    Commented Mar 24, 2018 at 16:43
  • $\begingroup$ Occam's razor doesn't seem to be relevant here though: introducing a new type of matter is extremely complex and unintuitive $\endgroup$
    – Gornemant
    Commented Mar 27, 2018 at 14:42
  • $\begingroup$ why introduce extremely complex stuff like exotic matter, when we can introduce dark matter. $\endgroup$
    – physics2000
    Commented Mar 27, 2018 at 14:44
  • $\begingroup$ But dark matter IS complex, so complex that we don't even know what it is! $\endgroup$
    – Gornemant
    Commented Mar 27, 2018 at 16:30

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