NOVA collaborates with Swedish scientific photographer Lennart Nilsson to use breathtaking new footage and state-of-the-art computer animation to show - in more complete detail than ever before - the making of a human life. Among the stunning sequences shot by Nilsson is the incredible voyage of the sperm toward the egg. Other events captured in Life?s Greatest Miracle include the journey of the fertilized ovum down the fallopian tube, the hatching of the embryo from its confining shell on day six, and the miraculous transformation of an embryo from a ball of cells into three layers from which all the body?s organs will emerge.