Albatrosses, of the biological family Diomedeidae, are large seabirds allied to the procellariids, storm-petrels and diving-petrels in the order Procellariiformes. They range widely in the Southern Ocean and the North Pacific.
Short tailed Albatross , Source: Wikipedia, DOR 16/09/2012
I read that albatrosses can stay airborne for up to a decade and that they can cycle brain activity between hemispheres. How do they do this feat, and how did they evolve this ability?
Possible points to consider: immune system, predation, cycling solar output, weather, seasons...