Can alien life forms coexist with us on Earth?

One of the most intriguing concepts to emerge in astrobiology over the past decade is the idea of ​​a “shadow biosphere” – a hidden layer of life forms that coexist with known Earth-dwelling organisms, potentially utilizing radical other biochemistry. Although this idea seems speculative at first glance, it is being taken seriously by some scientists as a hypothesis that could reshape our understanding of what life is and how it might evolve. But how much of this is based on scientific evidence, and how much remains in the realm of science fiction? The Origin of the Shadow Biosphere Concept The term “shadow biosphere” was popularized…