Reaching another developmental milestone that is also likely tied to evolutionary adaptation, Toren started smiling at around 7 weeks. I didn’t find a great reference for this, but the suggestion is that, just as the parents are getting so sleep-deprived and annoyed with their child to the point that they regret their decision, their newborn starts smiling. Whether or not this is an evolutionary adaptation, it does seem to have the effect of giving parents a second wind. Here are some of Toren’s first attempts at smiles at about 7 weeks:

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