Just wondering, already looked through a few sites.
Most Helpful Guy
Space is not empty. **If I'm remembering this right**... It has something like one particle in a volume the size of a golf ball. Outside the solar system this density increases, not decreases. Source: this video - I've watched the whole thing twice. Pretty cool and well presented.
Most Helpful Girl
The concept of universe is outdated. It is thought we actually live in an infinite multi-verse with multiple dimensions beyond the tradition 3-D. These extra dimensions are spiral shaped and all around us.
Also time is only a place in space and ideally it can move forward and backwards.1