papers of the week (01.to.05.06.2009)

Wnt7a Activates the Planar Cell Polarity Pathway to Drive the Symmetric Expansion of Satellite Stem Cells

Did Warfare Among Ancestral Hunter-Gatherers Affect the Evolution of Human Social Behaviors?

Entangled mechanical oscillators

Lorentz Violation: Motivation and new constraints

The Point of E_8 in F-theory GUTs