Alien Walled City Found On Mars, Lets Talk About Why NASA Shuts Up About It, Nov 2016, UFO Sighting News.

Date of discovery: November 2016
Location of discovery: Mars
Source NASA photo: http://hirise.lpl.arizona.edu/ESP_025723_1950

This walled city was found by Martian Archeology of Youtube and his name really fits. He found an ancient city with walls on all sides, but a small space between the walls. This is impossible to form this large in nature, but for intelligent beings...its the norm. 

You are asking yourself why NASA would not reveal such evidence to the public, correct? Its because if they keep the public in the dark, then they have can leak tiny discoveries to the public in order to keep their NASA funding budge and satisfy the publics curiosity about space. They will also not be pushed, or made to rush to Mars and other planets and moons if the other 194 countries on Earth are not aware of the alien civilisations that are out there, and the technology and abandoned bases, spaceships and energy germinators, mining facilities and space stations to be found. NASA wants to get there first to lay claim...to keep the US #1...otherwise a tiny country like...say...Taiwan could make a maned mission to Mars and make friends with an advanced alien race, gaining weapons and technology that would give them world power over night. Now...do you understand why NASA shuts up about life out there?
Scott C. Waring-Taiwan