Imagery from Mars is sent to Earth in a steady stream. This data is archived on the internet in different places and can be downloaded and manipulated by anyone with internet service and basic photo editing software.
If you’re patient and can dedicate time to scouring the imagery with software that’s capable of zooming, you can find some very interesting things.
Thanks to midnightplanets.com for discovering the vehicle and rider.
I discovered the fossilized sea creature three years ago.
(Click on each image for a larger view.)