How scientists are studying the amazing athletes in this ultra endurance race the yukon ultra to learn how conditions might be for humans in space. Fighting is intensifying in Eastern Ukraine hours before a new ceasefire is due to take effect prorussian separatists and ukraine army are battling near the town and these images claim to show a build up of Russian Artillery northeast of the junction town and tweeted by the u. S. Ambassador jeffrey piat on friday and said we are confident these are Russian Military and not separatists, ukraine president had this to say about the latest violence. After what this is of minsk its not just an attack of ukraine, this is an attack of minsk results and without explanation because unfortunately after minsk the defense operation of russia intensified significantly. Reporter so where is the fighting in Eastern Ukraine taking place as the clock ticks down to the ceasefire deadline . These are the areas currently held by the separatists fighters and se