Abook written in 1980 states that the peak of the last ice age occurred 18,000 years ago. therefore, in 2012, the peak had occurred years ago.

The correct answer is - 18,032 years ago.

To get to the correct answer we only need to take the given number of how much years ago the peak of the last age happened, which is 18,000, and than add the number of years between 1980 and 2012, which is 32 years, so we get to the number of 18,032. Still, even if this is the correct number of years, in the scientific circles, it will be very rarely used, because for the geological time spans they usually take a whole/rounded number, so it is much more likely that 18,000 years ago will still be used.

early human migrations are the earliest migrations and expansions of archaic and modern humans across continents and are believed to have begun approximately 2 million years ago with the out of africa migration of homo erectus. this initial migration was followed by other archaic humans including h. heidelbergensis, which lived around 500,000 years ago and was the likely ancestor of both denisovans and neanderthals. early hominids were said to have "crossed land bridges that were eventually covered in water" .

within africa, homo sapiens dispersed around the time of its speciation, roughly 300,000 years ago.the "recent african origin" paradigm suggests that the anatomically modern humans outside of africa descend from a population of homo sapiens migrating from east africa roughly 70,000 years ago and spreading along the southern coast of asia and to oceania before 50,000 years ago. modern humans spread across europe about 40,000 years ago.

the migrating modern human populations are known to have interbred with local varieties of archaic humans, so that contemporary human populations are descended in small part (below 10% contribution) from regional varieties of archaic humans.

after the last glacial maximum, north eurasian populations migrated to the americas about 20,000 years ago. northern eurasia was peopled after 12,000 years ago, in the beginning holocene. arctic canada and greenland were reached by the paleo-eskimo expansion around 4,000 years ago. finally, polynesia was peopled after 2,000 years ago, by the austronesian expansion.