  In recent years very important results were obtained from cosmic ray
experiments about the arrival direction distribution of primaries in the TeV
energy range. As most of these particles are charged nuclei, they are deflected
by the magnetic field they pass through before reaching the Earth surface, the
effect of the Lorentz force being inversely proportional to the particle
energy. As far as the local interstellar medium is known, the gyroradius of a
10 TeV proton is expected to be only 100 a.u., small enough to make the arrival
direction distribution isotropic. Since 1930s a "large scale"
(90{\deg}-120{\deg}) anisotropy is known to exist, generally interpreted as the
combined effect of sources far away and magnetic fields nearby. Nonetheless, in
the last decade experiments like Tibet-ASg, Milagro, ARGO-YBJ and IceCube
discovered structures as wide as 10{\deg}-30{\deg} all over the sky at ~ 10 TeV
energy, what is unexplainable within the standard model of cosmic rays. In this
paper a review of the most recent experimental results about cosmic ray
anisotropy is given, together with the status of the art of theoretical efforts
aimed at interpreting them within the current cosmic-ray paradigma.
