That latter claim loosely mirrors the change in migration over the past few months.
"It's a hell of a migration over the past two years," Mr. Jha said.
Polar wandering, the migration over the surface of the Earth of the magnetic poles of the Earth through geological time.
The ethnic makeups of the 32 squads at the World Cup reflect the sedimentary layers of global migration over the last 500 years.
The Global Estimated Net Migration by Decade: 1970-2000 data set provides estimates of net migration over the three decades from 1970 to 2000.
"The data allowed us to track migration over the course of individual animal's lifetime, and see how it changed over time", said Dr Müller.
How to cite this article: Baldini, L. M. et al. Persistent northward North Atlantic tropical cyclone track migration over the past five centuries.
Climate change is likely to be a massive driver of forced migration over the next century, as densely populated, low-lying areas become unliveable because of rising sea levels, inundation, and salinity.
Though Britain still only ranks 10th of 28 EU countries in terms of its foreign population, there is no doubt that the levels of migration over the past decade, driven largely by EU mobility, have been unprecedented.
It's happening already but it will become significantly more apparent, says Professor Philip Rees of the University of Leeds, whose projections point to much more "internal migration" over the next four decades.
