In physiology one of the fundamental things you learn, is to tell a lie is to be creative those that tell the best lies are most intelligent. Lying is also a paramount to survival(example you acquired some wealth as an artifact or treasure. You would not want that known because ultimately, someone would potentiality want to take it from you endangering the welfare of yourself and family.) So you would lie as self preservation. I believe lying is a innate survival tool.

It seems to me that the ability to deceive is a survival strategy it is a practice that we deployed in hunting and in self protection. It only stands to reason that once we developed language we would apply that same strategy to communication between our fellow humans.

everyone lies

Babies have very limited communication skills. What you described are babies asking for attention and comfort. That is not a lie in my book.

I see lying as being just as much of our nature as greed and most likely is tied to self preservation. It doesn't make it moral to lie but sometimes lies are a way to survive in a critical situation. Usually I'm too honest and find that gets me in trouble too, haha.

Hmmmm...In the case of babies crying, I can't see that as a "lie". An infant doesn't need to be ill to want attention. How did this study connect a baby's cry to lying? II'm not making the connection here.