http://www.wolframalpha.com/input/?i=ContourPlot3D[%28x^2%2B...]
From http://www.maa.org/mathland/mathtrek_02_11_02.html :
> The algorithms that Taubin developed worked well even in the vicinity of cusps and other singularities. "I discovered the equation of the heart while trying to construct surfaces with complex singularities," Taubin says.
Isn't that romantic?
http://www.wolframalpha.com/input/?i=ContourPlot3D[%28x^2%2B...]