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A NASA-funded team led by Felisa Wolfe-Simon of NASAΒ’s Astrobiology Institute announced a discovery that although humble and small as a microbe it fundamentally changes what we consider as life and the conditions where the development of life is possible. Every living being on Earth (microbes, elephants, humans, trees, everything) use exactly the same building blocks and the exact same replicating mechanism in a molecular level. This mechanism is based on DNA/RNA, molecular complex acids and the use of 6 basic chemical substances, carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur. Arsenic is a toxic substance because by behaving similarly to Phosphorus can disrupt this delicate process.

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