Babies as young as months) learned that their own kicking moves a mobile; and they retained that learning without later practice for as long as month(s).

Babies that are three months old are capable of learning this, and they retain the knowledge for one month if it is not reinforced. By this point, an infant's vision is good enough that they can see the mobile above them, and not just their mother's face, which was the range of their vision at birth. Their cognitive processes are also developed enough to connect their action to the mobile's movement.

Yes you are cute answer theories to explain the colonization of the new world the last great habitable landmass to be occupied by humans focus on the bering land bridge, or beringia, which emerge by siberia and alaska the last ice age.