Are there building on Mars?

Conspiracy theorists say new photos of Mars show that aliens could have built towers on the planet's surface.

Alien hunters MarsMoonSpaceTV and UFO YouTube channel SecureTeam10 describe a sphere shown on the edge of a Martian lake that dried up millions of years ago as a "massive white spherical object."  They also say a shadow indicates the object is not only large but, quote, "may have some height to it," and might be a tower structure.

Members of NASA's Mars Reconnaissance Orbiter team say the objects are probably tiny features called "spherules," which the Mars rover Opportunity discovered in 2004.

You decide.

Source: Daily Mail