saientists beileve that the first americans came from northeast asia. these people were porbably humters what is now northern china,japen, or siberia. many thouasnds of year ago, they crossed over from asia to what is now alaska. from there, they spread throughout north and south america. the first evidence for this theory was found in chile in 1936, when scientists found the teeth of some very early indians. these teeth porved to be very similar to the teeth of people in