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It doesn't need any light to live. it can survive in near—freezing temperature. it just feeds off the iron and the sulphur in the rocks down here, away from everything else. so what we think is that if there are lava tubes on mars, there could be life in there, too. next, daniel is keen to show me another terrestrial analogue a couple of hours' drive from the lava tube, and this one is even more extreme. we're going under the ice to an environment of very different challenges. we think about the lava tube that we visited earlier — that's a ready—made structure perfect for potential habit...

The suits have a lot of restrictions in terms of how your body can move, what you can actually feel or operate with your fingers. so there are a lot of challenges and restrictions for operating equipment and, as a result, for doing proper field research, so if you're not wearing a suit that is restricting some of those operations, then you don't really know how to problem solve and create the instruments that are going to be able to be operated properly in the field on either the moon or mars. scientists call landscapes which are analogous to other planets �*analogues�* and daniel leeb and...

Wow. yeah. and in the whole area of the basin around the volcano — olympus mons — it is believed there are certainly lava tubes. here's something else that's really exciting about this lava tube. now, mars is red because there is a lot of iron in the rocks. and that white glistening stuff there, that is icelandic cave bacteria. it doesn't need any light to live. it can survive in near—freezing temperature. it just feeds off the iron and the sulphur in the rocks down here, away from everything else. so what we think is that if there are lava tubes on mars, there could be life in there, to...

Planets �*analogues�* and daniel leeb and gunnar gudjonsson are trying to promote iceland as a place to do this kind of research. so they formed a two—person operation that they are calling the iceland space agency. iceland has some of the most diverse set of terrestrial analogues in close proximity to one another that exist anywhere on the planet. so you could be on mars, then you could drive down the road and be on something similar to the moon? that's right. in 1965 and 1967, the original apollo astronauts came here to iceland because they believed that the — that the terrestrial an...

Down here, away from everything else. so what we think is that if there are lava tubes on mars, there could be life in there, too. next, daniel is keen to show me another terrestrial analogue a couple of hours' drive from the lava tube, and this one is even more extreme. we're going under the ice to an environment of very different challenges. we think about the lava tube that we visited earlier — that's a ready—made structure perfect for potential habitat. whereas the analogue we're currently in, here in the ice tunnel, this is a wonderful place to do isolated confined extreme environment...