The Facebook-based approach circumvents these limitations, providing a new standard for measuring human movement. Their method uses the United Nations' recommended definition of migration ...

Their migrations recently were mapped by Global Initiative on Ungulate Migration researchers based at the University of Wyoming. (David Simpson, African Parks Photo) New maps released this week ...

The Facebook-based approach circumvents these limitations, providing a new standard for measuring human movement. Their method uses the United Nations' recommended definition of migration, counting ...