Any alien civilisations that existed may have already collapsed on themselves due to extensive progress, a new study has found. The study has been backed by the Jet Propulsion Laboratory of NASA in California.

The technological advances made by civilisations will “lead to complete destruction and biological degeneration.” This means that any intelligent life form that existed in the Milky Way Galaxy has already perished. 

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“If intelligent life is likely to destroy themselves, it is not surprising that there is little or no intelligent life elsewhere”, the now-published research paper said.

The study also clarified why humans are not one of the civilisations that have overachieved and reached the tipping point of annihilation. The paper says that human civilisation started billions of years after peak conditions were long gone.

The “peak conditions” are said to present about eight billion years after the Milky Way Galaxy was formed. Early humans existed about 13.5 billion years after the galaxy was formed.

The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old, according to the Museum of Natural History.

Similar research has been carried out in the past. According to a 2018 Forbes report, scientists concluded that alien civilisations perished — but due to climate change.

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Earth has also faced multiple mass extinction level events. However, none of them have been directly linked to human activities. The most recent ones include The Holocene Extinction, Cretaceous-Paleogene Extinction and the Triassic-Jurassic Extinction.

One of the most talked about is the Cretaceous-Paleogene Extinction, which reportedly wiped out 75% of all living species, including amphibians, birds, reptiles, and insects and dinosaurs. It also disrupted aquatic life.