In the north, and then ends in the south.
It is year of Prophet (PBUH) migration from Makkah (or Mecca) to Medina (both are currently in the Kingdom of Saudi Arabia). The migration marked out the real start of Islam religion spread, the start of the real Islam society, and the establishment of the Islam State.
Depends on what you mean... but I'll try.There is migration, chain migration, forced migration, voluntary migration, net-in migration, net-out migration, immigration, emmigration, countermigration.These are Human Geographic terms by the way. That makes about 9 types of migration.
Truman at the start and Eisenhower at the end
early youth would start at 10 and end at 29, mid youth would start at 30 and end at 119, late youth would start at 120 (est.) and end at 120.
Who you would call a migration expert would probably depend on which species migration you want information about. A person who specializes in, say, wolves and their migration might be totally different from aperson who specializes in the migration of, say, seagulls.