Artifacting* always hits on an uncanny feeling for me. No idea why. Fine job.

Something that thrives in high heat with high concentrations of greenhouse gasses.

And absolutely. Have you Seen what people would do for money?

Personal my bet's on a member of the aquatic kingdom or a corvid of some kind though. Maybe an octopus gets born without it's killswitch in one of those billions of years and takes over the planet.

But who am I kidding, in 10000 years nobody's going to remember there was a border conflict on this planet since we'll have already left this rock to burn.