Aliens and dinosaurs could have roamed the Earth at the same time, new research claims.
Top boffins, astrobiologist Rebecca Payne and astronomer Lisa Kaltenegger from Cornell University, United States, have claimed that any aliens looking for life on other planets around 540 million-years-ago would have had an easier time doing so, because of dinosaurs. And that if found, they probably would have come to Earth and lived alongside the beasts.
It turns out that during that time period, two biomarkers pairings were far higher than they are now – the pairings of oxygen and methane, and that of the ozone and methane. And during the time of the dinosaurs, around 65 million-years-ago, the planet was rampant with dinosaurs taking advantage of the higher rates.
READ MORE: Dinosaurs could still exist on other planets – and humans could find them soon
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The higher results would mainly have been because of the planet being filled with more greenery, which humans have since destroyed. The claims were made in the new report published on the Monthly Notices of the Royal Astronomical Society website.
The report states: “While similar processes may or may not be ongoing on exoplanets, the Phanerozoic Eon nevertheless provides an under explored template for a habitable planet with varying levels of atmospheric oxygen.”
And Kaltenegger said: “Modern Earth's light fingerprint has been our template for identifying potentially habitable planets, but there was a time when this fingerprint was even more pronounced – better at showing signs of life. This gives us hope that it might be just a little bit easier to find signs of life – even large, complex life – elsewhere in the cosmos.”
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The pair also mused that dinosaurs could actually exist on other planets, and we could find them soon enough. The report claims that experts should look into what compounds were on Earth 65 million years ago, and try to search for those in space instead as it could lead to the discovery of dinosaurs.
They detail about, in the search for life in the Universe, Earth provides a template of “evolution for the one habitable planet we know”. Earth’s atmospheric composition has changed significantly throughout its history, as oxygen levels have risen from under 10% to 35%.
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