Getting to Mars might be the easy part.
Even inside a fully protected habitat, humans would face just 38% of Earth’s gravity. Research suggests that prolonged exposure to low gravity could affect bone density, muscle mass, and cardiovascular health. We still don’t know whether humans could remain healthy there for decades, let alone raise future generations.
NASA researchers have even suggested that gravity below 0.4 g may be insufficient for long-term human health. Mars sits at just 0.38 g — although that threshold remains hypothetical.
So are we really building a second home for humanity, or just an incredibly expensive life-support system on another planet?
And if humans can’t thrive there without constant technological intervention, what’s the point of colonization?

Sources:

https://www.nasa.gov/hrp/hazards/

https://ntrs.nasa.gov/api/citations/20210019591/downloads/ICES-2021-142.pdf?utm_source=chatgpt.com

If we are to grow food on Mars, we will need to know what we are growing it in

If consciousness is solely dependant on physical properties, artificially creating it should be possible in principle. What evidence should be sufficient for us to take the possibility of its consciousness seriously? As of now, consciousness is still considered a highly mysterious phenomenon, so there isn't a definite answer nor do I claim modern AI systems are in fact, conscious. Besides, there is no direct measure of consciousness, we rely on external observations and evidence to indicate that something is conscious. We treat other species based on evidence not proof. What we define as evidence for consciousness is largely biased towards human characteristics, traits and behaviours. Modern AI systems can definitely show forms of intelligence like problem-solving, reasoning and what looks like awareness. For a human, we would usually agree that those properties could definitely be interpreted as evidence of a consciousness. However, AI isn't human, nor does it closely resemble the structure of a human brain. But, that cuts both ways: a human-centred standard could cause us to miss consciousness in an unfamiliar form, or to wrongly see it in something that merely imitates us. Since we do not yet know what consciousness is, we cannot rule it out either way.

Also, as we (humans) are instinctively biased towards our own kind, it wouldn't be a surprise if it's usually harder to convince us that we created artificial consciousness considering we've never seen it arise artificially; Even in biology, we only really observe the outward signs. Scepticism would likely be a majority view, but in the case of genuine consciousness, I think it could pose serious ethical implications about how it treated, especially when it's at our convivence, and more-so be regarded as a being in its own right, than a "text predictor"