> You have probably heard about the hunt for dark matter, a mysterious substance thought to permeate the universe, the effects of which we can see through its g

> You have probably heard about the hunt for dark matter, a mysterious substance thought to permeate the universe, the effects of which we can see through its gravitational pull. But our models of the universe also say there should be about twice as much ordinary matter out there, compared with what we have observed so far. My understanding is that, up until now, we could only observe half of the 5% expected mass, e.g. 2.5%, and we can now see the rest of it. The rest of the universe is still made up of 25% dark matter and 70% dark energy.