Why Are Babies So Useless?

Almost all animal babies emerge from their mother or from an egg able to do the things that its species is expected to do. Mammals feed their young for a time, but even kittens and puppies can walk around on their own at about two weeks of age. Then there are humans, who are spectacularly helpless for a very long time. They can't walk, talk, eat, or control elimination for a couple of years, and even then they need guidance and protection. Why do we have such an extended infancy? 

In one version of the story, Eve ate the fruit of the tree of the knowledge of good and evil, and was cursed to bear big-brained babies in pain. That's not far from the science version, because humans have enormous brains for their body size, and we had to offload a lot of that brain growing to after birth. Not all of it, of course, as anyone who has given birth will yell you. Human mothers wouldn't survive much more baby brain size. That equates to humans being born relatively premature compared to other animals. Getting a child to maturity is quite a chore, but it also has its upsides, as this video from The Thought Vortex explains.