Martian craters

The Mariner 4 probe passed within 6000 miles of the Martian surface and provided the first close-up images of Mars, revealing cratered landscapes similar to the Moon. This ended speculation of advanced Martian civilizations and canals.
 (NASA) United States 1965 Martian craters

The Mariner 4 probe passed within 6000 miles of the Martian surface and provided the first close-up images of Mars, revealing cratered landscapes similar to the Moon. This ended speculation of advanced Martian civilizations and canals.