Do you think Earth will still contain evidence of human existence 100 million years from now?
If we can track dinosaurs, somebody will see the massive clusterfu¥ck we've left behind.
Possible. My favorite candidate for lasting evidence is Mount Rushmore. If it's granite, it may not be completely eroded. And nuclear waste.
Yes but they may think it's just a rock that's shaped weird. They wouldn't know what human faces looked like :P, or any of our biology. On other planets the animals likely don't have 2 eyes, a nose, etc.
Yes, the plastic grocery bags will still be left.
That's a myth. Plastic keeps about 40,000 years.
It was a joke.
We have a placard campaign "don't teach your trash to swim" that claims exactly forever.
But, not a very good one.
Not the ones from Boston Market. Those things will outlast the sun going nova.