I assume that refers to the "seem" in the center of each side that is pretty clear to see. So each side is really 2 sides separated by that seem? Looks like each one angles in slightly from each edge toward the center?

Apparently so....
http://www.catchpenny.org/concave.html

so its gon be like that huh?

Heroin was originally a brand name trademarked by drug company Bayer in 1898 and sold as a cough medicine.

Switching fonts could save the US government $136 million a year

http://news.yahoo.com/blogs/sidesho...th-plan-to-save-u-s--big-bucks-192231144.html

10% of America's annual rice crop is used to make beer.

Zui Quan is a style of Kung Fu in which the fighter imitates the movements of a drunk person.

My hope is that some Tigerfan member goes on Jeopardy and wins because he or she remembers an obscure fact posted here