Porabolas:

• http://mathforum.org/mathimages/index.php/Parabolic_Bridges

• http://blog.debate.org/2010/11/22/were-1-st-louis-tops-most-dangerous-cities-in-america-rankings/

Circles:

• http://www.soccerballworld.com/HistoryWCBalls.htm

• http://en.academic.ru/dic.nsf/enwiki/11737071

Hyperbolas:

• http://britton.disted.camosun.bc.ca/jbconics.htm

• http://en.wikipedia.org/wiki/Saint_Louis_Science_Center

Ellipses:

• http://myweb.rollins.edu/jsiry/SolarSystem.html

• http://www.google.com/imgres?imgurl=&imgrefurl=http%3A%2F%2Fbritton.disted.camosun.bc.ca%2Fjbconics.htm&h=0&w=0&sz=1&tbnid=3Lbmj7k02sNYzM&tbnh=200&tbnw=253&zoom=1&docid=bZKYayFU5KYxCM&ei=AADrUuX2ApCHogSG7IC4Cg&ved=0CAUQsCUoAQ