"Well, the universe is shaped exactly like the earth
If you go straight long enough you'll end up where you were."
"There's a continuing discussion among astronomers regarding the actual shape of the Universe. Right now, the most widely accepted model supports that of a flat universe.
This has been confirmed through accurate measurements made by WMAP (Wilkinson Microwave Anisotropy Probe), a spacecraft that maps out the differences in temperature of the cosmic microwave background radiation (CMBR) across the entire sky. These results, which only has a 2% margin of error, were released in 2008.
Even before the WMAP measurements, a project in 2001 known as Boomerang already showed that the Universe was flat within 15% accuracy."
^See 2nd half of 2nd link.
Post more maybe? Or not, whatever.
inb4 this becomes a shit thread.