Dark matter emits no light, and cannot be directly observed, but scientists think that it and dark energy make up most of the mass of the universe. Space.com Dark Matter and Dark Energy in my opinion is similar to the charred remains of a log after the energy has been consumed. Just like a charred log the interior would still be hot as the remaining energy was slowly used up. Similar to our Universe the Charred Log Theory would show the interior of the Universe as full of radiant energy in the form of suns, planets, etc with Dark Matter being the charred remains of the shell that once surrounded us like the layers of a log. If you were to wipe your hand across a piece of charred wood, make certain that is not hot of course, each swipe would add a mass of Dark Matter and Dark Energy until your hand was covered in the stuff. Eventually your hand would become five times as heavier with the amount of charred wooden remains. This effect could be similar to how Dark Matter and Dark Energy creates an external amount of pressure on the Universe contained within the Universal Log of Creation.