Help Shape the Future of Space Exploration

Join The Planetary Society Now  arrow.png

Join our eNewsletter for updates & action alerts

    Please leave this field empty

possibility of fundamentally different life beyond our solar system

Doug Currie

December 5, 2013

Of course I can't say for sure but although DNA has worked well on earth and all known earth life is based on it I think there are other possibilities for life beyond earth. This could involved other amino acids than the ones in DNA, or other chemicals such as silicon, arsenic, sulfur or perhaps fluorine or chlorine or sodium for example instead of some of the atoms in DNA or some other geometry than the double helix. There could also be quite different planets or animals made of something like DNA or the above materials. With stars of different wavelengths such as red dwarfs there could also be plants etc. more sensitive to those wavelengths. If there is substantial amounts in different ratios than atoms and molecules on earth there could also be different colors and compositions of clouds, liquids, sky or rocks than on earth. I am not sure which of these could support life but creation has also been demonstrated to be more versatile than we thought before we discovered extrasolar planets.


Leave a Comment:

You must be logged in to submit a comment. Log in now.
Facebook Twitter Email RSS AddThis

Planetary Defense

An asteroid or comet headed for Earth is the only large-scale natural disaster we can prevent. Working together to fund our Shoemaker NEO Grants for astronomers, we can help save the world.



Beyond The Horizon, There's More To Explore!

Become a member of The Planetary Society and together we will create the future of space exploration.

Join Us

Space in Images

Pretty pictures and
awe-inspiring science.

See More

Join The Planetary Society

Let’s explore the cosmos together!

Become a Member

Connect With Us

Facebook, Twitter, YouTube and more…
Continue the conversation with our online community!