Mariner 9 imaging in 1971 revealed the first direct evidence of water on theRed Planet.
Secondly, frost deposition is linked to colder martian seasons, making the window for spotting it even narrower.
In short, we have to know where and when to look for ephemeral frost.
This discovery was possible thanks to successful collaboration between both of ESAs Mars orbiters, and additional modelling.
But theyre really interesting because theyre places where astronauts might be able to go and be safe from radiation.
Yet to better understand the conditions, a more detailed investigation is definitely needed.
So these pits we see could open into larger caves, or they could just be isolated pits.
Theres no way to know whats in them until we explore them in more detail, he explained.
And then, who knows how the most similar planet to Earth will surprise us next.
People on the internet were sharing their excitement about the new discoveries on Mars
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