Caves on Mars can be considered as potential bases for astronauts: radiation should not affect their depths. This was reported to TASS by Vladimir Surdin, a senior researcher at the P. K. Sternberg State Astronomical Institute (GAISH) of Lomonosov Moscow State University.
He reminded that the journey to Mars will take the crew more than six months, after which the astronauts will need to recover to go back.
We found caves on Mars, there should be no radiation in them. This is the only chance to return from Mars: to sit there, recover, get well, and then go back. Or maybe even stay there, if they like it.
Surdin emphasized: the radiation level on the Red Planet is 1.5 times higher than in low Earth orbit. That is why caves are not just an interesting object for study, but a possible shelter for future expeditions.