Over the past 25 years, probabilities of first, repeat, and return migration have been linked more to the forces identified by social capital theory and the new economics of migration than to the cost ...

The National Academies of Sciences, Engineering, and Medicine are private, nonprofit institutions that provide expert advice on some of the most pressing challenges facing the nation and world. Our ...

Bird migration patterns have captivated and confused ... At one point, the prevailing theory for hummingbirds was that they migrated on the backs of geese. We know now, of course, that none ...

The author is assistant professor (History) at the Shaheed Bhagat Singh College, Delhi University. The terms “Vedic period” and “Arya” have captured the attention of historians and the ...

The Dorian invasion theory hypothesizes that a large-scale migration or invasion was responsible for dramatic changes to ...

But to actually sleep during migration? One current theory is that birds undergo slow-wave sleep only in one hemisphere of the brain at a time, which may allow for proper muscle functioning and ...

Chichester: Wiley-Blackwell. Parry, Benita. (2005). Reflections on the Excess of Empire in Tayeb Salih's Season of Migration to the North. Paragraph: A Journal of Modern Critical Theory, 28 (2), 72–90 ...