My (extremely rudimentary) understanding of Biology is that many of the building blocks of life are chiral and that life on earth is entirely made up molecules with the same chirality.
Does this have any interesting repercussions for our understanding of abiogenesis?
EDIT: Just to be clear I am interested in understanding how life developed from non-life (on Earth in particular and, more speculatively, in the universe broadly). For instance, the article linked in Matt's answer that it may be due to the polarization of light in our area of the galaxy is very interesting.
I see several (not necessarily exclusive) hypotheses (and probably am certainly missing some) about the asymmetry of the chirality of existing lifeforms of and was wondering if there was any sort of consensus (or at least informed speculation) on which was more likely or less.
- Abiogenesis is an incredibly rare phenomena and so the opposite chiral life never developed.
- Which every chiral form of life appeared first and this prevented the formation of the other chiral form of life.
- There is some sort of selection principle that selects for the chirality we appear.
- If simple versions of life and mirror life occur simultaneously it precludes or retards the development of complex lifeforms (A sort of anthropic principle).
- ``Mirror life" is not actually possible--there is some subtle phenomena that requires the chirality we have on Earth.
- Something else...