```
"Are you sure it's a footprint?" Geng Jia stepped forward to examine it carefully.
"Judging from the marks and the size of the footprints, they indeed appear to be human. Given the climate conditions on Mars, I can't think of any reason why something resembling a footprint would appear."
The researcher said.
After some analysis, more and more details suggested that these were indeed human footprints.
Why would there be human footprints on Mars?
At the Mars Base, everyone was utterly shocked.
"Footprints? Are there really footprints?"
Geng Jia said to a tall, thin man beside him, "Li Xuan, come out with me to have a look later."
"I'll go too!"
"No need, the base vehicle can only carry two people. You dispatch other robots to check other places for footprints or any signs of human activity."
A sense of excitement mixed with a touch of panic took hold of the group.
The vast expanse of space bearing signs of human existence, how could one not be thrilled and frightened?
