Could invisible aliens really exist among us? An astrobiologist explains

Life is pretty easy to recognise. It moves, it grows, it eats, it excretes, it reproduces. Simple. In biology, researchers often use the acronym “MRSGREN” to describe it. It stands for movement, respiration, sensitivity, growth, reproduction, excretion and nutrition.

But Helen Sharman, Britain’s first astronaut and a chemist at Imperial College London, recently said that alien lifeforms that are impossible to spot may be living among us. How could that be possible? More about this article in the link below…

“Could invisible aliens really exist among us? An astrobiologist explains”

https://theconversation.com/amp/could-invisible-aliens-really-exist-among-us-an-astrobiologist-explains-129419

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