Exploration of Mars
The Viking program launched "Viking 1" and "Viking 2" spacecraft to Mars in 1975; The program consisted of two orbiters and two landers – these were the first two spacecraft to successfully land and operate on Mars.
The primary scientific objectives of the lander mission were to search for biosignatures and observe meteorologic, seismic and magnetic properties of Mars. The results of the biological experiments on board the Viking landers remain inconclusive, with a reanalysis of the Viking data published in 2012 suggesting signs of microbial life on Mars.
The Viking orbiters revealed that large floods of water carved deep valleys, eroded grooves into bedrock, and traveled thousands of kilometers. Areas of branched streams, in the southern hemisphere, suggest that rain once fell.
Thunderbirds machines
A metallic-blue spacecraft that made the first manned landing on Mars. "Zero-X" first appeared in the first "Thunderbirds" feature film, "Thunderbirds Are Go", and subsequently in the first episode of "Captain Scarlet and the Mysterons". It is assembled hours prior to launch and consists of 5 parts: The MEV (Martian Exploration Vehicle), the main fuselage, "Lifting Body 1" and "2", two wing-like structures loaded with thruster packs and also incorporate landing gear at the ends, and the reflective Nose Cone, which is a large metallic nose which attaches to the MEV.