News from z ˜ 6--10 Galaxy Candidates Found Behind Gravitational Lensing Clusters

We summarise the current status of our project to identify and study z ˜ 6-10 galaxies thanks to strong gravitational lensing. Building on the detailed work from tet{sch:richard06}, we present results from new follow-up observations (imaging) undertaken with ACS/HST and the Spitzer Space Telescope and compare our results with findings from the Hubble Ultra-Deep Field (UDF). These new observations are in agreement with the high-z nature for the vast majority of the candidates presented in tet{sch:richard06}. We also discuss the properties of other optical dropout sources found in our searches and related objects (EROs, sub-mm galaxies, etc.) from other surveys.