The interior of Mars has never been mapped, and Mars is thought to be the best planet to help in understanding planetary formations due to its size and age.
In 2020, scientists were able to prove volcano activity on Mars. "This is the first study that proves activity in the Mars interior from a purely chemical point of view, on real Martian samples," explained planetary geologist Nicola Mari of the University of Glasgow to the website ScienceAlert.
The Viking 2 landed on the Martian surface in 1976 and lasted four years until its batteries died.
For NASA's first successful landing on Mars, NASA prepared two identical spacecrafts called the Viking 1 and the Viking 2.
Landers and rovers on Mars relay pictures or scientific data to Martian satellites, that in turn relay them to Earth. The pictures and data throughout the years have led us to many interesting discoveries about the planet, though there is still plenty more to be discovered.
In this gallery, check out every successful landing and rover mission to the red planet leading up to NASA's Mars 2020 Perseverance landing. Click on to find out more!
Mission to Mars: every successful landing on the red planet
What we've discovered is incredible
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Landers and rovers on Mars relay pictures or scientific data to Martian satellites, that in turn relay them to Earth. The pictures and data throughout the years have led us to many interesting discoveries about the planet, though there is still plenty more to be discovered.
In this gallery, check out every successful landing and rover mission to the red planet leading up to NASA's Mars 2020 Perseverance landing. Click on to find out more!