It is disputed whether subsequent migration to North America took place around 30,000 years ago, or only considerably later, around 14,000 years ago.

The discussion of the leadership tussle also throws more light upon the population increase and the reason why there was subsequent migration from Ugbokha.

Their subsequent westward migration, possibly in waves, is now believed to have occurred about AD 500.

This would indicate a significance which dwarfs all subsequent migrations to Britain from Europe.

In fact, I think it was their prosperity that was responsible for the subsequent migration that worked such calamity upon the Folk.

The subsequent migration of employees across the street (and into home offices) generally coincided with what was probably the final exodus of employees from the company.

However, attempts to determine historical population genetics are complicated by subsequent migrations and demographic fluctuations.

Cavalli-Sforza suspected it might have spread because the farmers themselves moved, as the new practice led to higher population densities and subsequent migration.

The completion of Phase I in 1984 led to a large amount of unemployment among its 20,000 employees and subsequent migration from the area.

Then a subsequent migration within and out of Africa eventually replaced the earlier H. erectus.