Is there empirical evidence for dark matter and dark energy?

To answer your question in a nutshell, No. there is no evidence for dark matter or dark energy. As of right now they are nothing more than speculative theories to explain the problems with galaxy motion and behaviour etc as others have explained.There is also basically little to say about the theories and workings of dark matter/energy since it's currently 1 big mystery. All we say is that it might be some kind of sub atomic particles and there are currently experiments going on deep in the earths crust to try and detect them.it's the biggest mystery in cosmology since it thought to account for 97% of the universe's matter, based on this, it is more than likely that our current view of the universe is quite wrong.

thank you Percy. I suppose my "no evidence" could be a little misleading.Unless our view of cosmic gravity leaves alot to be desired, it is almost a certaintity that dark matter/energy exist.my point was that these "labels" right now stand at saying pretty much nothng but "the universe is expanding and galaxies are spinning alot more than their visible matter justifies. Therefore there must be something that we can't see here going on." We call it dark matter/energy and have ideas and speculations about what it might be, but as of 2010 we have no underlying evidence for it, no clue how it works, what it is or anything.