"Babies have big heads and big eyes, and tiny little bodies with tiny little arms and legs. So did the aliens at Roswell! I rest my case"

This quote by William Shatner is a funny contrast in between infants and aliens. He is suggesting that the aliens seen at Roswell, New Mexico in 1947 had a similar physical look to that of a baby. By saying "I rest my case," Shatner is indicating that the similarities between infants and aliens are so striking that it is evidence that aliens exist. This quote is an easy going method of suggesting that aliens might have checked out Earth in the past. It is likewise a tip that we need to not be so quick to dismiss the possibility of extraterrestrial life.