Derrickson also skillfully provides an explanation for why Klaatu would be a bipedal hominid (an unlikely product of independent evolution on another planet)-- genetic engineering of placental tissue surrounding his original alien body,
with embryological development sped up hundreds of times to transform him into a being recognizably human.
A Source: Eggs, milk, liver, fish, spinach, carrots, sweet potatoes Effects of deficiency: Weakened immune system, night blindness; hinders
embryological development Who's at risk: Alcoholics, infants in poor countries
with foods low in beta - carotene; people in Africa and Southeast Asia, where polished rice, which lacks the vitamin, is a staple Fortification options: Milk, oil, margarine Estimated millions of children affected: 140