NASA's Ingenuity helicopter took off for its 72nd and final flight on Mars.
The Perseverance rover successfully landed on Mars.
Water-bearing minerals were discovered on Mars by NASA's Curiosity Rover.
NASA celebrated April Fool's Day by telling the world that they found water on Mars.
Mars made its closest approach to Earth in nearly 60,000 years.
The Viking 2 became the second spacecraft to land on Mars.
Mars had a 'close encounter' with Earth at 34.8 million miles apart.
Asaph Hall discovered Mars' second moon, called Phobos.
One of Mars' moons, 'Deimos,' was discovered by an American astronomer, Asaph Hall.