Hank Green has a good pop-science video on this topic (what things are being found on Mars, and what they might mean): https://www.youtube.com/watch?v=iWuFBZw9O

Hank Green has a good pop-science video on this topic (what things are being found on Mars, and what they might mean): https://www.youtube.com/watch?v=iWuFBZw9Olk https://www.youtube.com/watch?v=iWuFBZw9Olk in summary, we were all imagining a Star Trek "take me to your leader" moment of First Contact, and instead he imagines it will be a slow transition of increasing evidence that convinces more and more people over years and years.