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An audio compact disc ( CD ) holds up to 74 minutes , 33 seconds of music , just enough for a complete recording of Ludwig van Beethoven 's Ninth Symphony on one disc . " I do n't actually have one , but its 1s and 0s look just as cryptic as Stonehenge 's pillars . When three pursuers start at the corners of an equilateral triangle , they meet at a point in the middle of the triangle . Instead of focusing on what happens in an equilateral triangle with all three dogs moving at the same speed , he looked at a more general case involving triangles that are not equilateral . On a clear , moonless night , we see thousands of stars scattered across the sky . It would be " catastrophic " if they do n't , said Jacqueline Lain , associate executive director for governmental relations for the Texas Association of School Boards .