Children can experience "survivor's guilt" as young as

The correct answer is four years old.

A child that has experience traumatic experiences as early as 4 years old, may already experience Survivor's Guilt. Survivor's Guilt refers to the guilt that an individual experiences, due to the belief he or she has that he/she shouldn't have survived through a traumatic event.

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.