Life on Earth is carbon-based. But that doesn’t mean other planets have to use the same building block.

5-8-2019 5-8-2019 organosilicon based life c e cad b bf a e a bfba nbcnews fp
An artists' rendering of organosilicon-based life. Organosilicon compounds contain carbon-silicon bonds. Image: Lei Chen/Yan Liang/Caltech

All life on Earth, and thus, all life we’ve ever observed in the universe, shares a few basic characteristics. Its molecular structures are built using carbon, it relies on water to act as a solvent and facilitate chemical reactions, and it uses DNA or RNA as its blueprints.

But just because these properties of life are true on Earth doesn’t mean they are true everywhere. In fact, we can readily imagine different environments where alternative forms of life can exist. Here are some of the major ways we think that life can vary from the standard we see on Earth.

Under certain conditions, silicon-based chemistry might be more favorable for life than carbon-based. Silicon chemistry would also be much more amenable to life in oceans of cold elements that we don’t usually associate with life, such as liquid nitrogen, methane, ethane, neon, and argon. Places like these exist in the universe, notably in our own solar system.

Related article:  7 things to know about autism, including why it's unlikely there will ever be a 'cure'

A lot of what we know about chemistry suggests that carbon- and water-based life will be the most common among the universe, but we’ve only ever had a sample of one to study: our own planet.

Read full, original post: What would alternate, alien forms of life look like?

Outbreak
Outbreak Daily Digest
Biotech Facts & Fallacies
Talking Biotech
Genetics Unzipped
ft covidresponseus feature

Video: Viewpoint: The US wrote the global playbook on the coronavirus and then ignored it

A year ago, the United States was regarded as the country best prepared for a pandemic. Our government had spent ...
mag insects image superjumbo v

Disaster interrupted: Which farming system better preserves insect populations: Organic or conventional?

A three-year run of fragmentary Armageddon-like studies had primed the journalism pumps and settled the media framing about the future ...
dead bee desolate city

Are we facing an ‘Insect Apocalypse’ caused by ‘intensive, industrial’ farming and agricultural chemicals? The media say yes; Science says ‘no’

The media call it the “Insect Apocalypse”. In the past three years, the phrase has become an accepted truth of ...
globalmethanebudget globalcarbonproject cropped x

Infographic: Cows cause climate change? Agriculture scientist says ‘belching bovines’ get too much blame

A recent interview by Caroline Stocks, a UK journalist who writes about food, agriculture and the environment, of air quality ...
organic hillside sweet corn x

Organic v conventional using GMOs: Which is the more sustainable farming?

Many consumers spend more for organic food to avoid genetically modified products in part because they believe that “industrial agriculture” ...
benjamin franklin x

Are most GMO safety studies funded by industry?

The assertion that biotech companies do the research and the government just signs off on it is false ...
gmo corn field x

Do GMO Bt (insect-resistant) crops pose a threat to human health or the environment?

Bt is a bacterium found organically in the soil. It is extremely effective in repelling or killing target insects but ...
favicon

Environmental Working Group: EWG challenges safety of GMOs, food pesticide residues

Known by some as the "Environmental Worrying Group," EWG lobbies for tighter GMO legislation and famously puts out annual "dirty dozen" list of fruits and ...
m hansen

Michael Hansen: Architect of Consumers Union ongoing anti-GMO campaign

Michael K. Hansen (born 1956) is thought by critics to be the prime mover behind the ongoing campaign against agricultural biotechnology at Consumer Reports. He is an ...
News on human & agricultural genetics and biotechnology delivered to your inbox.
Optional. Mail on special occasions.
Send this to a friend