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Scientists have discovered unexpected ingredients for life — organic molecules never seen before in meteorites — inside a chunk of space rock that fell to Earth over California last year, scientists say.
Scientists investigating the origin of life often suppose dissolved compounds desirable for life need to first have gotten concentrated and held together somehow, much as cell membranes do for the cell's components. The organic molecules the researchers discovered in the Sutter's Mill fragments "could be good for such a purpose, because they can form rudimentary enclosures to contain compounds useful to prebiotic evolution," Pizzarello said.
Fry points to scientists such as Hermann von Helmholtz in Germany, Lord Kelvin in England, and Svante Arrhenius in Sweden, who promoted the idea of sperms of life wandering the universe and taking root in any planet with the appropriate conditions. This idea of the seeds of life being everywhere became known as the Panspermia hypothesis (?pan? being the Latin root meaning ?all?). Helmholtz, Kelvin, and others suggested that life traveled to planets within meteorites. Arrhenius and others claimed that seeds of life, protected as spores, could be pushed toward planets by solar radiation.?
The earliest evidence for life on Earth comes from fossilized mats of cyanobacteria called stromatolites in Australia that are about 3.4 billion years old. Ancient as their origins are, these bacteria (which are still around today) are already biologically complex—they have cell walls protecting their protein-producing DNA, so scientists think life must have begun much earlier, perhaps as early as 3.8 billion years ago.
Most scientists agree that life went through a period when RNA was the head-honcho molecule, guiding life through its nascent stages. According to this "RNA World" hypothesis, RNA was the crux molecule for primitive life and only took a backseat when DNA and proteins—which perform their jobs much more efficiently than RNA—developed.
Makes sense to me.
How I interpreted it was like this(and correct me if I am wrong please)..
-Cells pretty much form a cacoon around themselves in a natural process that lets it live in extreme of gentle environments-therefore making those cells protected while searching throughout the galaxy until they hit a planet capable of supporting those cells- giving it a chance to "seed". Which would be the case throughout the galaxy.
-How close am I ?
reply to post by lewtra
Great video and thank you for posting!