Sentences with phrase «known migration patterns»

Not exact matches

Previously documented migrations of West African farmers to East Africa around 2,000 years ago, and then to southern Africa around 1,500 years ago, reshaped Africans» genetics — and obscured ancient ancestry patterns — more than has been known, the researchers report online September 28 in Science.

The researchers do not yet know the purpose of the whales» calls, but say that they should help them unravel other mysteries, including the minke whales» overall abundance and migration patterns.

We know, however, that both state migration patterns and the skills of interstate migrants are likely to differ depending on people's educational background, so we estimate NAEP scores separately for workers with different levels of educational attainment.

I suspect you know all about censuses, population models, migration patterns and rates, natural increases, decreases and algorithms for using these different sets of data, yes?

Birdwatchers have been aware for decades of these «irruptions,» as the migrations of immense numbers of birds to areas far outside their usual range are known, but scientists say they've now identified climate patterns as the driving force behind them.