Matter
The universe is build from matter.
Explanation
Nature was created during the Big Bang, and the same type of process still takes place. In atomic test installations, such as at CERN in Geneva, this is accurately examined. In vacuum fluctuations, out of 'nothing' both matter and antimatter are created, but that also disappears together again real soon.
In this way, particles can be thought of as excited states of the underlying quantum vacuum, and all properties of matter are merely vacuum fluctuations arising from interactions of the zero-point field.
Note
This means, however, that from nothing (what we call 0) something (let's call that 1) may arise. With mathematics, you can calculate things which we intuitively cannot imagine.