On This Day in 1969, Mariner 6 Set Off to Study Mars—So What Did We Learn?
Sadly enough, no little green men.
On February 25th, 1969, NASA launched Mariner 6, a spacecraft intended to conduct a flyby of Mars to search for signs of life on the red planet. When it passed by Mars, it took many pictures. It might not sound like much, but those photos revealed many Martian mysteries. Here's what we learned.
