NASA doesn't want to find life on Mars. They want to find evidence, so that the next probe can be more complex and more expensive than the previous one.
NASA will never send wet microscope to Mars, you know, the kind you used in school to show bacteria in dirty water. As that would instantly prove life on Mars and make ever more expensive probes hard to justify.
The other reason is planetary protection. The best places to send a microscope are low lying areas where there may be brines near the surface. Those specific areas have been designated high on the list of protection sites. Earth microbes are really resilient, so even with intense sterilization procedures we can't be 100% sure. We don't want to contaminate the most valuable scientific find ever, and so we're approaching it carefully.
But I think the first reason I gave is the most significant one. It's technically pretty hard and not definitive. The surface of Mars is probably mostly sterile even if there is life. If it survives, it's probably underground.
I also disagree that NASA would not want to find life. If anything, finding life would make their budget explode. They could suddenly make a strong case for a Europa submersible, a submarine to visit Titan's methane lakes, huge space-based SETI radio telescope arrays, huge space telescopes to try to find more exoplanets and characterize their atmospheres, all kinds of things, since we'd know for a fact there's life out there.
If life emerged in two places in one solar system, we'd know that the universe is teeming with it. Maybe not complex intelligent life -- there's still reasons to think Earth may be kind of special for that. But life, certainly.
I suspect that NASA knows this full well, as do Mars scientists, and I suspect that they are being very careful to make sure that definitive proof does not appear until they understand all sorts of other stuff about the planet.
To imply there would be a conspiracy to cover up such discoveries because you think the opposite would happen is such an odd way to think about things.
Citation needed
> NASA will never
Citation needed
I think there has been evidence of life in the Venusian atmosphere since the 80s and on/in Mars since the 70s.
It also doesn't make sense from any kind of financial perspective. The budget for NASA would explode for all kinds of missions. They would have free reign to go wherever and do anything.
The discovery team would instantly create brand new fields of study and career paths, and anyone on the team that discovered life would become experts in the field with unlimited investment opportunities to continue their research.
The delay in communication makes ambitious manoeuvres challenging - perhaps advances in AI (and by extension robotics) helps build much more autonomous space rovers. This could enable us, for example, to evaluate the samples by sending wet microscopes with the rover itself.
Everybody looking at the wrong targets. Mars is a dead, radiation cooked, burned, poisonous place. Forget about it, leave it to the trillionaires.
raychis•1h ago