This desert in northern Chile, like the red planet, is hot, dusty and extremely dry.
Yet life exists here: tiny algae and bacteria that have evolved to survive in the parched earth on little more than sunlight.
If they have done it here, then why not on Mars, 225 million kilometers (140 million miles) away?
"If life existed there, it would probably be very similar to life here," says biologist Cristina Dorador from the nearby University of Antofagasta.
"But if we manage to understand how these micro-organisms live, how they obtain moisture and how they adapt to these conditions, then probably very soon, when we have more information about life forms on other planets, we will have something here on Earth to compare it with."
Scratching the surface
Dorador will analyze the fragments in a mobile laboratory which she drives around the desert in search of tiny life forms.
She is one of dozens of scientists from various countries working on different Mars-related projects in the Atacama desert.
Separately, US space agency NASA in February carried out its second phase of practice-drilling for samples in the earth of Atacama with specially designed rovers.
"If life exists or ever existed on Mars, the planet's surface dryness and extensive (sunlight) radiation exposure would likely drive it underground," NASA said in a report.
"That makes locations like the Atacama good places to practice looking for life on Mars."
Space agencies and science fiction writers alike have long been fascinated by Mars -- one of the closest planets to Earth.
The Soviet Union and United States started aiming probes there in the 1960s.
For the past four years NASA has had a robot, Curiosity, on the planet searching for life.
It has sent back photographs of the planet's surface whose grey rocks look much like those of Atacama.
US President Donald Trump has taken up his predecessor Barack Obama's pledge to send humans to Mars in the 2030s.
Scientists have detected traces of water and methane gas on Mars, raising hopes of finding life there.
Within our solar system, there is nowhere but Mars with such conditions for life, Nitschelm says.
"If there is no life on Mars, there is none anywhere" but on Earth, he says.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
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