Thursday, March 29, 2012

Scientist Creates Lifelike Cells Out of Metal

This article is interesting in its implications for the possible forms of life that could exist in infinite collection of planets in this universe. -AK
Photo: p.Gordon/Flickr

By Bryan Nelson
Fri, Sep 16 2011 at 1:38 AM EST

Scientists trying to create artificial life generally work under the assumption that life must be carbon-based, but what if a living thing could be made from another element?

One British researcher may have proven that theory, potentially rewriting the book of life. Lee Cronin of the University of Glasgow has created lifelike cells from metal — a feat few believed feasible. The discovery opens the door to the possibility that there may be life forms in the universe not based on carbon, reports New Scientist.
Even more remarkable, Cronin has hinted that the metal-based cells may be replicating themselves and evolving.

"I am 100 percent positive that we can get evolution to work outside organic biology," he said.

The high-functioning "cells" that Cronin has built are constructed from large polyoxometalates derived from a range of metal atoms, like tungsten. He gets them to assemble in bubbly spheres by mixing them in a specialized saline solution, and calls the resultant cell-like structures "inorganic chemical cells," or iCHELLs.

The metallic bubbles are certainly cell-like, but are they actually alive? Cronin has made a compelling case for the comparison by constructing the iCHELLS with a number of features that make them function much as real cells do. For instance, by modifying the outer oxide structure of the bubbles so that they are porous, he has essentially built iCHELLs with membranes capable of selectively allowing chemicals in and out according to size, much as what happens with the walls of real cells.

Cronin's team has also created bubbles inside of bubbles, which opens the door to the possibility of developing specialized "organelles." Even more compelling, some of the iCHELLs are being equipped with the ability to photosynthesize. The process is still rudimentary, but by linking some oxide molecules to light sensitive dyes, the team has constructed a membrane that splits water into hydrogen ions, electrons and oxygen when illuminated — which is how photosynthesis begins in real cells.

Of course, the most compelling lifelike quality of the iCHELLs so far is their ability to evolve. Although they aren't equipped with anything remotely resembling DNA, and therefore can't replicate themselves in the same way that real cells do, Cronin has nevertheless managed to create some polyoxometalates that can use each other as templates to self-replicate. Furthermore, he is currently embarked on a seven-month experiment to see if iCHELLs placed in different environments will evolve.

The early results have been encouraging. "I think we have just shown the first droplets that can evolve," Cronin hinted.

Though the idea of a strange new metal-based form of life rapidly evolving in a lab somewhere on Earth may sound ominous, the finding could forever change how life is defined. It also greatly improves the odds of life existing elsewhere in the universe, since life forms could potentially be built from any number of different elements.

The possibilities are exciting to imagine, even if Cronin's iCHELLs eventually fall short of full-blown living cells. His research may have already blown the door off previous paradigms about the conditions necessary for life to form.

1 comment:

  1. David Wilcock has talked about this stuff a few times. Here's a quote from an interview he did with Project Camelot:

    "[...] Dan Burisch, ( whom you guys have interviewed) he's talking about his Lotus project in which you have a crystal of silicone basically like quartz, and you just put it in distilled water purified and run the whole thing in an autoclave, there is no way that there would be contamination in it. Hit it with a little bolt of electricity, and things start growing in the water! Well, this has been done since the last century, in the 19th century.

    Sir William Crookes is one of the guys who did this. He took a volcanic rock, electrified it, put some drops of water on it, and these little mites grew out of this murk, and they grew legs and detached and started walking around."

    The only contention I have with this article is that it's saying that these scientists are "creating" these lifeforms, while I believe it to be more accurate to say that the scientists are merely replicating the circumstances that allow for life to "spontaneously generate."

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