Quotes from the news wire:
Not every sample Perseverance is collecting will be done in the quest for ancient life, and we don't expect this first sample to provide definitive proof one way or the other, while the rocks located in this geologic unit are not great time capsules for organics, we believe they have been around since the formation of Jezero Crater and incredibly valuable to fill gaps in our geologic understanding of this region -- things we'll desperately need to know if we find life once existed on Mars.
These rocks are likely to be mudstones, once mud at the bottom of the lake, and these are very important for our investigation because this is the kind of environment that we expect to be most habitable by organisms that might have existed on Mars billions of years ago, as well as having the capability to preserve bio signatures over the billions of years since.
[It's] very interesting for us in the science side to be able to participate in this demonstration of the operational capability of a helicopter, of course, we recognize that the ability to both scout rover traverse directions, making sure that there are pathways that are safe and efficient to get us to where we want to goand the ability to fly the helicopter out into terrain that the rover cannot possibly traverse to bring back scientific data -- this is extremely important for future missions that could combine a rover with a reconnaissance helicopter.
Perseverance's sophisticated science instruments will not only help in the hunt for fossilized microbial life, but also expand our knowledge of Martian geology and its past, present, and future, our science team has been busy planning how best to work with what we anticipate will be a firehose of cutting-edge data. That's the kind of' problem' we are looking forward to.
The best place to look for life is a place where you think life could have existed, the current surface of Mars is too cold and too dry for any life we know about to exist. Billions of years ago, it was much warmer with water on the surface. Rocks deposited at that time were in habitable environments and they record them.