earth space
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Was there someone here before us?
They really are desperate to prove their Global Warming Thesis:

Fifty-six million years ago, the Earth warmed far above the temperatures we experience today - and ice at the poles melted.

Could the event - the Paleocene-Eocene Thermal Maximum (PETM) - be evidence of global warming caused by an extinct civilisation which ruled Earth before mankind?

Comment: The dinosaurs came and went because of global cataclysms and abrupt climate change - are they at fault because they didn't invent electric cars? Dinosaurs appeared much earlier, then their numbers exploded during planetary upheaval and mass extinction event

It sounds like the kind of crackpot conspiracy to be found on 'ancient alien' UFO sites, but scientists have seriously investigated the idea.

Professor Adam Frank of the University of Rochester writes in The Atlantic that the investigation could offer insight into how to find alien life - or about our impact on our planet.

Frank writes, 'There is a conundrum here. If an earlier species's industrial activity is short-lived, we might not be able to easily see it.

Comment: And so if we're scientists with an agenda, then we can concoct any old theory.

'The PETM's spikes mostly show us the Earth's timescales for responding to whatever caused it, not necessarily the timescale of the cause.

'So it might take both dedicated and novel detection methods to find evidence of a truly short-lived event in ancient sediments. In other words, if you're not explicitly looking for it, you might not see it.'

Comment: Aka confirmation bias:
also called confirmatory bias or myside bias, is the tendency to search for, interpret, favor, and recall information in a way that confirms one's preexisting beliefs or hypotheses.

Frank says the researchers thought about what our civilisation might leave behind in rocks for future civilisations to find - plastics in the ocean, evidence of fertiliser use, and (most of all) evidence of fossil fuel use.

Comment: Who's to say that a previous civilisation would need the same technologies that we do today? Who's to say they suffered pollution? Or that they even needed fossil fuels?

The scientists concluded that there is no evidence of an earlier civilisation on our planet - but the idea throws up possibilities about how the cycle of life might operate on other planets.

Comment: Again they conclude wrong, because there is evidence of earlier civilisation. But since we can't prove the tired lie of man made global warming on our planet, we should start looking on others because then we'll find proof!

Frank says that civilisations might - through their collapse - trigger the conditions to create more fossil fuels, for future civilisations to use.

Frank says, 'Our work also opened up the speculative possibility that some planets might have fossil-fuel-driven cycles of civilization building and collapse. If a civilization uses fossil fuels, the climate change they trigger can lead to a large decrease in ocean oxygen levels.

'These low oxygen levels (called ocean anoxia) help trigger the conditions needed for making fossil fuels like oil and coal in the first place. In this way, a civilization and its demise might sow the seed for new civilizations in the future.'