THE SHAPE OF THINGS TO COME
'(<a href="http://www.j-archive.com/media/2009-10-07_DJ_20.wmv">Sarah of the Clue Crew shows an animation of conic sections on the monitor.</a>)  A cut parallel to the base of a cone gives us a circle; an angular cut above the base creates an ellipse; & an angular cut through the base makes this shape'
a parabola