[muawiyah]

See how desperate the "little earth" crowd is to hang onto the idea that life originated here and it originated one time and that's all there is to it.

But, once you find out that one of the processes has to have an outer space origin I'd think your belief in that nonsense would weaken, and here the guy is faced with TWO processes that have to have an outer space origin and he's still praying at the same old temple.

[BroJoeK]

muawiyah: "See how desperate the "little earth" crowd is to hang onto the idea that life originated here and it originated one time and that's all there is to it."

The idea that some chemical "building blocks" of life may have arrived aboard meteors or comets has been around for a very long time now.
So, no scientist argues that it could not happen, only that the evidence for it is, well, not yet conclusive.

For example, of all these "building blocks" in outer space, which ones could not have formed, given its earliest conditions, on Earth itself?

muawiyah: "But, once you find out that one of the processes has to have an outer space origin..."

"has to" is a pretty strong term.
The article itself only claims:

"This result therefore supports the hypothesis that the asymmetry of biological molecules on Earth has a cosmic origin."

"Supporting a hypothesis" is not exactly the same thing as proving a theory. ;-)