They like to face right.
Only 15% of newborns prefer to turn their head left when lying on their back. It seems to be related to a gene, like having dimples. This bias lasts for a few months, and it may help explain why more people are right-handed, too.
They have more of certain brain cells.
Although a baby's brain will get bigger -- more than doubling in size the first year -- it already has most of the nerve cells that carry electrical messages. Many of these neurons won't get replaced as they die, so adults have fewer of them. The connections between cells get "trimmed" as babies get older, which helps them focus but also cuts back on creativity.
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