To migrate or protrude

Did early Homo migrate "out of" or "in to" Africa?

T he origin of our own genus remains frustratingly unclear. Although many of my colleagues are agreed regarding the “what” with respect to Homo, there is no consensus as to the “how” and “when” questions. Until relatively recently, most paleoanthropologists (including the writer) assumed Africa was the answer to the “where” question, but in a little more than a decade discoveries at two sites b...

Why Migrate: For Study or for Work?

Over the past decades, globalization has led to a huge increase in the migration of workers, as well as students. This paper develops a simple two-step model that describes the decisions of an individual vis-à-vis education and migration, and presents a unified model, wherein the two migration decisions are combined into a single, unique model. This paper shows that under the plausible assumpti...

Poised to migrate

Hearts grow with the flow properly formed heart comes only after effort—the pumping of cells through a primitive heart to generate gene-activating shear forces. who have come up with a method for watching heart development by culturing developing zebrafish on microscope stages. The researchers tracked the movement of blood cells against the background of fluorescently stained blood serum. High-...

The Willingness to Migrate in the CEECs .

Mast cells migrate from blood to brain.

It is well established that mast cells (MCs) occur within the CNS of many species. Furthermore, their numbers can increase rapidly in adults in response to altered physiological conditions. In this study we found that early postpartum rats had significantly more mast cells in the thalamus than virgin controls. Evidence from semithin sections from these females suggested that mast cells were tra...