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      • While it is believed that all life on our planet derives from one common ancestor, the genetic code is much more flexible and diverse than usually appreciated. The biochemistry of information transfer in an alien species would almost certainly use different building blocks and encodings, and perhaps even a different number of bases.
      www.smithsonianmag.com/air-space-magazine/science-aliens-part-2-what-kind-genetic-code-would-extraterrestrials-have-180977685/
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  2. Mar 7, 2022 · Scientists discovered universal biochemical patterns in enzymes across Earth’s life forms, potentially enabling predictions about alien life with different biochemistry. This breakthrough expands the search for life beyond Earth-specific models.

  3. Jan 10, 2020 · Could invisible aliens really exist among us? An astrobiologist explains. The Earth may be crawling with undiscovered creatures with a different biochemistry to life as we know it.

    • Samantha Rolfe
  4. Dec 28, 2018 · Life on Earth is a unity due to the existence of the universal genetic code. The exchange of genetic information from very different paths of evolution (horizontal gene transfer (HGT), yellow arrows) is facilitated by the universal genetic code fixing the basic core cellular chemistries (left side).

    • Christian Diwo, Nediljko Budisa
    • 10.3390/genes10010017
    • 2018
    • Genes (Basel). 2019 Jan; 10(1): 17.
  5. Feb 1, 2023 · Much of astrobiology research involves searching for chemical “biosignatures”—molecules or combinations of molecules that could indicate the presence of life. But because scientists can’t...

  6. May 10, 2021 · Alien life would likely have different biochemistry, which may change the way it reproduces. The DNA that is central to life on our own planet may not be a given in the rest of the...

    • Dirk Schulze-Makuch
  7. Mar 18, 2021 · Arik Kershenbaum, a zoologist and animal communications researcher at the University of Cambridge, thinks that the evolutionary forces that shape life on Earth will produce many similar features in extraterrestrial life.

  8. Nov 29, 2020 · When astrobiologists look for physical evidence of past or present life beyond Earth, they search for biosignatures, like molecules with chemistry that doesn’t make sense on the basis of nonliving processes.