Maybe. I know there are a lot of isotopes with short half llves after a blast, but not sure how much plutonium or what not would be left. It could look like a

Maybe. I know there are a lot of isotopes with short half llves after a blast, but not sure how much plutonium or what not would be left. It could look like a massive series of asteroid strikes. But outside that, it wouldn't show anything about humans. Just "some beings did that".