18-month-old American girl Amelia Taylor is learning to speak and walk like many other children of her age. But few would have thought that this healthy and energetic baby was actually the world's smallest premature infant. She came to this world after only 21 weeks and 6 days in her mother's womb. More incredibly, Amelia was a test-tube baby. We can't help but be awed by the miracle created by this little life.